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  • Enforcing a query in MySql to use a specific index

    - by Hossein
    Hi, I have large table. consisting of only 3 columns (id(INT),bookmarkID(INT),tagID(INT)).I have two BTREE indexes one for each bookmarkID and tagID columns.This table has about 21 Million records. I am trying to run this query: SELECT bookmarkID,COUNT(bookmarkID) AS count FROM bookmark_tag_map GROUP BY tagID,bookmarkID HAVING tagID IN (-----"tagIDList"-----) AND count >= N which takes ages to return the results.I read somewhere that if make an index in which it has tagID,bookmarkID together, i will get a much faster result. I created the index after some time. Tried the query again, but it seems that this query is not using the new index that I have made.I ran EXPLAIN and saw that it is actually true. My question now is that how I can enforce a query to use a specific index? also comments on other ways to make the query faster are welcome. Thanks

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  • Does a version control database storage engine exist?

    - by Zak
    I was just wondering if a storage engine type existed that allowed you to do version control on row level contents. For instance, if I have a simple table with ID, name, value, and ID is the PK, I could see that row 354 started as (354, "zak", "test")v1 then was updated to be (354, "zak", "this is version 2 of the value")v2 , and could see a change history on the row with something like select history (value) where ID = 354. It's kind of an esoteric thing, but it would beat having to keep writing these separate history tables and functions every time a change is made...

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  • "SELECT TOP", "LEFT OUTER JOIN", "ORDER BY" gives extra rows

    - by Codesleuth
    I have the following Access query I'm running through OLE DB in .NET: SELECT TOP 25 tblClient.ClientCode, tblRegion.Region FROM (tblClient LEFT OUTER JOIN tblRegion ON tblClient.RegionCode = tblRegion.RegionCode) ORDER BY tblRegion.Region There are 431 records within tblClient that have RegionCode set to NULL. For some reason, the query above returns all these 431 records instead of the first 25. If I change the query to ORDER BY tblClient.Client (the name of the client) like so: SELECT TOP 25 tblClient.ClientCode, tblRegion.Region FROM (tblClient LEFT OUTER JOIN tblRegion ON tblClient.RegionCode = tblRegion.RegionCode) ORDER BY tblClient.Client I get the expected result set of 25 records, showing a mixture of region names and NULL values. Why is it that ordering by a field retrieved through a LEFT OUTER JOIN will the TOP clause not work?

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  • TableAdapter.Update not working

    - by Wesley
    Here is my function: private void btnSave_Click(object sender, EventArgs e) { wO_FlangeMillBundlesTableAdapter.Update(invClerkDataDataSet.WO_FlangeMillBundles); wO_HeadMillBundlesTableAdapter.Update(invClerkDataDataSet.WO_HeadMillBundles); wO_WebMillBundlesTableAdapter.Update(invClerkDataDataSet.WO_WebMillBundles); int rowsaffected = wO_MillTableAdapter.Update(invClerkDataDataSet.WO_Mill); MessageBox.Show(invClerkDataDataSet.WO_Mill.Rows[0]["GasReading"].ToString()); MessageBox.Show(rowsaffected.ToString()); } You can see the fourth update in the function uses the same functionality as the rest, I just have some debugging stuff added. The first three tables are bound to DataGridViews and work fine. The fourth table has it's members bound to various text boxes. When I change the value in the text box bound to the GasReading column and click save the first MessageBox does in fact show the new value, so it's making it into the dataset correctly. However, the rowsaffected is always showing 0 and the value in the actual database is not being updated. Can anyone see my problem? I understand that the problem must be elsewhere in my code since the four update methods are the same, but I just don't know where to start.

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  • Parameters in query with in clause ?

    - by Hugues Van Landeghem
    Hi all, I want to use parameter for query like this : SELECT * FROM MATABLE WHERE MT_ID IN (368134, 181956) so I think about this SELECT * FROM MATABLE WHERE MT_ID IN (:MYPARAM) but it doesn't work... Is there a way to do this ? I actually use IBX and Firebird 2.1 I don't know how many parameters in IN clause.

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  • complicated inserts

    - by liysd
    I have to do something like this insert into object (name, value, first_node) values ('some_name', 123, 0) @id = mysql_last_insert_id() insert nodes (name, object_id) values ('node_name',@id) @id2 = mysql_last_insert_id() update object set first_node=@id2 where id=@id Is it possible to make it simpler? What if I want to insert more pairs (object, node) with resonable efficency?

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  • how to compare dates in php and sql?

    - by sebastian
    Hi, I want to make a notification system. Shortly.. to compare two dates, the only problem is that i want to compare the months. to see if a month or two have passed from last notification. i want to use one or two months from an entry in a mysql database. the client must select when the notification must come, one or two months. thank you, Sebastian

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  • Using the ASP.NET membership provider database with your own database?

    - by Shaharyar
    Hello everybody, We are developing an ASP.NET MVC Application that currently uses it's own databse ApplicationData for the domain models and another one Membership for the user management / membership provider. We do access restrictions using data-annotations in our controllers. [Authorize(Roles = "administrators, managers")] This worked great for simple use cases. As we are scaling our application our customer wants to restrict specific users to access specific areas of our ApplicationData database. Each of our products contains a foreign key referring to the region the product was assembled in. A user story would be: Users in the role NewYorkManagers should only be able to edit / see products that are assembled in New York. We created a placeholder table UserRightsRegions that contains the UserId and the RegionId. How can I link both the ApplicationData and the Membership databases in order to work properly / having cross-database-key-references? (Is something like this even possible?) All help is more than appreciated!

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  • Filling data in FormView from different tables

    - by wacky_coder
    Hi, I am using a FormView in an online quiz page for displaying the questions and RadioButtons (for answers) http://stackoverflow.com/questions/2438219/online-quiz-using-asp-dot-net Now, I need to pick the questions according to a TestID and a particular Set of that Test. The testid and the set_number would be passed using Session variables. I'm having 3 testIDs and 3 Sets per TestID and, thus, am using 9 tables to store the Questions, the Options and the correct answer. I need help on how to set the FormView so that it extracts the questions from a particular table only. Do I need to use a StoredProcedure ? If yes, how? PS: If I use only one table to store all the questions from each Set and for each TestID, I can do that, but I'd prefer using separate tables.

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  • Very interesting problem in Compact Framework

    - by Alexander
    Hi, i have a performance problem while inserting data to sqlce.I'm reading string and making inserts to My tables.In LU_MAM table,i insert 1000 records withing 8 seconds.After Mam tables i make some inserts but my largest table is CR_MUS.When i want to insert record into CR_MUS,it takes too much time.CR_MUS has 2000 records and insert takes 35 seconds.What can be reason?I use same logic in my insert functions.Do u have any idea?I use VS 2008 sp1. Dim reader As StringReader reader = New StringReader(data) cn = New SqlCeConnection(General.ConnString) cn.Open() If myTransfer.ClearTables(cn, cmd) = True Then progress = 0 '------------------------------------------ cmd = New SqlServerCe.SqlCeCommand Dim rs As SqlCeResultSet cmd.Connection = cn cmd.CommandType = CommandType.TableDirect Dim rec As SqlCeUpdatableRecord ' name of table While reader.Peek > -1 If strerr_col = "" Then satir = reader.ReadLine() ayrac = Split(satir, "|") If ayrac(0).ToString() = "LC" Then prgsbar.Maximum = Convert.ToInt32(ayrac(1)) ElseIf ayrac(0).ToString = "PPAR" Then . If ayrac(2).ToString <> General.PMVer Then ShowWaitCursor(False) txtDurum.Text = "Wrong Version" Exit Sub End If If p_POCKET_PARAMETERS = True Then cmd.CommandText = "POCKET_PARAMETERS" txtDurum.Text = "POCKET_PARAMETERS" rs = cmd.ExecuteResultSet(ResultSetOptions.Updatable) rec = rs.CreateRecord() p_POCKET_PARAMETERS = False End If strerr_col = myVERI_AL.POCKET_PARAMETERS_I(ayrac, cmd, rs, rec) prgsbar.Value += 1 ElseIf ayrac(0).ToString() = "MAM" Then If p_LU_MAM = True Then txtDurum.Text = "LU_MAM " cmd.CommandText = "LU_MAM" rs = cmd.ExecuteResultSet(ResultSetOptions.Updatable) rec = rs.CreateRecord() p_LU_MAM = False End If strerr_col = myVERI_AL.LU_MAM_I(ayrac, cmd, rs, rec) prgsbar.Value += 1 ElseIf ayrac(0).ToString = "KMUS" Then If p_CR_MUS = True Then cmd.CommandText = "CR_MUS" txtDurum.Text = "CR_MUS" rs = cmd.ExecuteResultSet(ResultSetOptions.Updatable) rec = rs.CreateRecord() p_TR_KAMPANYA_MALZEME = False End If strerr_col = myVERI_AL.CR_MUS_I(ayrac, cmd, rs, rec) prgsbar.Value += 1 end while Public Function CR_KAMPANYA_MUSTERI_I(ByVal f_Line() As String, ByRef myComm As SqlCeCommand, ByRef rs As SqlCeResultSet, ByRef rec As SqlCeUpdatableRecord) As String Try rec.SetValue(0, If(f_Line(1) = String.Empty, DirectCast(DBNull.Value, Object), f_Line(1))) rec.SetValue(1, If(f_Line(2) = String.Empty, DirectCast(DBNull.Value, Object), f_Line(2))) rec.SetValue(2, If(f_Line(3) = String.Empty, DirectCast(DBNull.Value, Object), f_Line(3))) rec.SetValue(3, If(f_Line(5) = String.Empty, DirectCast(DBNull.Value, Object), f_Line(5))) rec.SetValue(4, If(f_Line(6) = String.Empty, DirectCast(DBNull.Value, Object), f_Line(6))) rs.Insert(rec) Catch ex As Exception strerr_col = ex.Message End Try Return strerr_col End Function

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  • Problem with the dateformatter's in Iphone sdk.

    - by monish
    Hi guys, Here I had a problem with the date formatters actually I had an option to search events based on the date.for this Im comparing the date with the date store in the database and getting the event based on the date for this I wrote the code as follows: -(NSMutableArray*)getSearchAllLists:(EventsList*)aEvent { [searchList removeAllObjects]; EventsList *searchEvent = nil; const char* sql; NSString *conditionStr = @" where "; if([aEvent.eventName length] > 0) { NSString *str = @"'%"; str = [str stringByAppendingString:aEvent.eventName]; str = [str stringByAppendingString:@"%'"]; conditionStr = [conditionStr stringByAppendingString:[NSString stringWithFormat:@" eventName like %s",[str UTF8String]]]; } if([aEvent.eventWineName length]>0) { NSString *str = @"'%"; str = [str stringByAppendingString:aEvent.eventWineName]; str = [str stringByAppendingString:@"%'"]; if([aEvent.eventName length]>0) { conditionStr = [conditionStr stringByAppendingString:[NSString stringWithFormat:@" and (wineName like %s)",[str UTF8String]]]; } else { conditionStr = [conditionStr stringByAppendingString:[NSString stringWithFormat:@"wineName like %s",[str UTF8String]]]; } } if([aEvent.eventVariety length]>0) { NSString *str = @"'%"; str = [str stringByAppendingString:aEvent.eventVariety]; str = [str stringByAppendingString:@"%'"]; if([aEvent.eventName length]>0 || [aEvent.eventWineName length]>0) { conditionStr = [conditionStr stringByAppendingString:[NSString stringWithFormat:@" and (variety like %s)",[str UTF8String]]]; } else { conditionStr = [conditionStr stringByAppendingString:[NSString stringWithFormat:@"variety like %s" ,[str UTF8String]]]; } } if([aEvent.eventWinery length]>0) { NSString *str = @"'%"; str = [str stringByAppendingString:aEvent.eventWinery]; str = [str stringByAppendingString:@"%'"]; if([aEvent.eventName length]>0 || [aEvent.eventWineName length]>0 || [aEvent.eventVariety length]>0) { conditionStr = [conditionStr stringByAppendingString:[NSString stringWithFormat:@" and (winery like %s)",[str UTF8String]]]; } else { conditionStr = [conditionStr stringByAppendingString:[NSString stringWithFormat:@"winery like %s" ,[str UTF8String]]]; } } if(aEvent.eventRatings >0) { if([aEvent.eventName length]>0 || [aEvent.eventWineName length]>0 || [aEvent.eventWinery length]>0 || [aEvent.eventVariety length]>0) { conditionStr = [conditionStr stringByAppendingString:[NSString stringWithFormat:@" and ratings = %d",aEvent.eventRatings]]; } else { conditionStr = [conditionStr stringByAppendingString:[NSString stringWithFormat:@" ratings = %d",aEvent.eventRatings]]; } } if(aEvent.eventDate >0) { NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init]; [dateFormatter setDateFormat:@"dd-MMM-yy 23:59:59"]; NSString *dateStr = [dateFormatter stringFromDate:aEvent.eventDate]; NSDate *date = [dateFormatter dateFromString:dateStr]; [dateFormatter release]; NSTimeInterval interval = [date timeIntervalSinceReferenceDate]; printf("\n Interval in advance search:%f",interval); if([aEvent.eventName length]>0 || [aEvent.eventWineName length]>0 || [aEvent.eventWinery length]>0 || aEvent.eventRatings>0 || [aEvent.eventVariety length]>0) { conditionStr = [conditionStr stringByAppendingString:[NSString stringWithFormat:@" and eventDate = %f",interval]]; } else { conditionStr = [conditionStr stringByAppendingString:[NSString stringWithFormat:@" eventDate = %f",interval]]; } } NSString* queryString= @" select * from event"; queryString = [queryString stringByAppendingString:conditionStr]; sqlite3_stmt* statement; sql = (char*)[queryString UTF8String]; if (sqlite3_prepare_v2(database, sql, -1, &statement, NULL) != SQLITE_OK) { NSAssert1(0, @"Error: failed to prepare statement with message '%s'.", sqlite3_errmsg(database)); } sqlite3_bind_text(statement, 1, [aEvent.eventName UTF8String], -1, SQLITE_TRANSIENT); sqlite3_bind_text(statement, 2, [aEvent.eventWineName UTF8String], -1, SQLITE_TRANSIENT); sqlite3_bind_text(statement, 3, [aEvent.eventVariety UTF8String], -1, SQLITE_TRANSIENT); sqlite3_bind_text(statement, 4, [aEvent.eventWinery UTF8String], -1, SQLITE_TRANSIENT); sqlite3_bind_int(statement, 5,aEvent.eventRatings); sqlite3_bind_double(statement,6, [[aEvent eventDate] timeIntervalSinceReferenceDate]); while (sqlite3_step(statement) == SQLITE_ROW) { primaryKey = sqlite3_column_int(statement, 0); searchEvent = [[EventsList alloc] initWithPrimaryKey:primaryKey database:database]; [searchList addObject:searchEvent]; [searchEvent release]; } sqlite3_finalize(statement); return searchList; } Here I compared the interval value in the database and the date we are searching and Im getting the different values and results were not found. Guy's help me to get rid of this. Anyone's help will be much appreciated. Thank you Monish Calapatapu.

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  • Replace duplicate spaces with single space in TSQL

    - by Chris
    I need to ensure that a given field does not have more than one space (not concerned about all white space, just space) between characters. So 'single spaces only' Needs to turn into 'single spaces only' The below will not work select replace('single spaces only',' ',' ') as it would result in 'single spaces only' I would really prefer to stick with native TSQL rather than a CLR based solution. Thoughts?

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  • Using outer query result in a subquery in postgresql

    - by brad
    I have two tables points and contacts and I'm trying to get the average points.score per contact grouped on a monthly basis. Note that points and contacts aren't related, I just want the sum of points created in a month divided by the number of contacts that existed in that month. So, I need to sum points grouped by the created_at month, and I need to take the count of contacts FOR THAT MONTH ONLY. It's that last part that's tricking me up. I'm not sure how I can use a column from an outer query in the subquery. I tried something like this: SELECT SUM(score) AS points_sum, EXTRACT(month FROM created_at) AS month, date_trunc('MONTH', created_at) + INTERVAL '1 month' AS next_month, (SELECT COUNT(id) FROM contacts WHERE contacts.created_at <= next_month) as contact_count FROM points GROUP BY month, next_month ORDER BY month So, I'm extracting the actual month that my points are being summed, and at the same time, getting the beginning of the next_month so that I can say "Get me the count of contacts where their created at is < next_month" But it complains that column next_month doesn't exist This is understandable as the subquery knows nothing about the outer query. Qualifying with points.next_month doesn't work either. So can someone point me in the right direction of how to achieve this? Tables: Points score | created_at 10 | "2011-11-15 21:44:00.363423" 11 | "2011-10-15 21:44:00.69667" 12 | "2011-09-15 21:44:00.773289" 13 | "2011-08-15 21:44:00.848838" 14 | "2011-07-15 21:44:00.924152" Contacts id | created_at 6 | "2011-07-15 21:43:17.534777" 5 | "2011-08-15 21:43:17.520828" 4 | "2011-09-15 21:43:17.506452" 3 | "2011-10-15 21:43:17.491848" 1 | "2011-11-15 21:42:54.759225" sum, month and next_month (without the subselect) sum | month | next_month 14 | 7 | "2011-08-01 00:00:00" 13 | 8 | "2011-09-01 00:00:00" 12 | 9 | "2011-10-01 00:00:00" 11 | 10 | "2011-11-01 00:00:00" 10 | 11 | "2011-12-01 00:00:00"

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  • Ampersand in sqlite query

    - by Denis Gorodetskiy
    How to construct sqlite query containing ampersand in filter: SELECT id FROM mediainfo WHERE album="Betty & Kate"; I use sqlite C interface (sqlite3_bind_text() and ? marks while query building) but neither C query nor SQLite Administrator return any data

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  • MySQL - Calculating a value from two columns in each row, using the result in a WHERE or HAVING clause

    - by taber
    I have a MySQL db schema like so: id flags views done ------------------------------- 1 2 20 0 2 66 100 0 3 25 40 0 4 30 60 0 ... thousands of rows ... I want to update all of the rows whose flags / views are = 0.2. First as a test I want to try to SELECT to see how many rows would actually get updated. I tried: SELECT flags/views AS poncho FROM mytable HAVING poncho 0.2 But this only returns like 2 rows and I know there should be a lot more than that. It seems like it's calculating the poncho value on all rows or something odd. What am I doing wrong? Thanks!

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  • Alternative to sql NOT IN?

    - by Alex
    Hi, I am trying to make a materialized view in Oracle (I am a newbie, btw). For some reason, it doesn't like the presence of sub-query in it. I've been trying to use LEFT OUTER JOIN instead, but it's returning different data set now. Put simply, here's the code I'm trying to modify: SELECT * FROM table1 ros, table2 bal, table3 flx WHERE flx.name = 'XXX' AND flx.value = bal.value AND NVL (ros.ret, 'D') = Nvl (flx.attr16, 'D') AND ros.value = bal.segment3 AND ros.type IN ( 'AL', 'AS', 'PL' ) AND bal.period = 13 AND bal.code NOT IN (SELECT bal1.code FROM table2 bal1 WHERE bal1.value = flx.value AND bal1.segment3 = ros.value AND bal1.flag = bal.flag AND bal1.period = 12 AND bal1.year = bal.year) And here's one of my attempt: SELECT * FROM table1 ros, table2 bal, table3 flx LEFT OUTER JOIN table2 bal1 ON bal.code = bal1.code WHERE bal1.code is null AND bal1.segment3 = ros.value AND bal.segment3 = ros.value AND bal1.flag = bal.flag AND bal1.year = bal.year AND flx.name = 'XXX' AND flx.value = bal.value AND bal1.value = flx.value AND bal1.period_num = 12 AND NVL (ros.type, 'D') = NVL (flx.attr16, 'D') AND ros.value = bal.segment3 AND ros.type IN ( 'AL', 'AS', 'PL' ) AND bal.period = 13; This drives me nuts! Thanks in advance for the help :)

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  • add schema to path in postgresql

    - by veilig
    I'm the process of moving applications over from all in the public schema to each having their own schema. for each application, I have a small script that will create the schema and then create the tables,functions,etc... to that schema. Is there anyway to automatically add a newly created schema to the search_path? Currently, the only way I see is to find the users current path SHOW search_path; and then add the new schema to it SET search_path to xxx,yyy,zzz; I would like some way to just say, append schema zzz to the users_search path. is this possible?

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  • Android : SQL Lite insertion or create table issue

    - by Ram
    Team, can anyone please help me to understand what could be the problem in the below snippet of code? It fails after insertion 2 and insertion 3 debug statements I have the contentValues in the Array list, I am iterating the arraylist and inserting the content values in to the database. Log.d("database","before insertion 1 "); liteDatabase = this.openOrCreateDatabase("Sales", MODE_PRIVATE, null); Log.d("database","before insertion 2 "); liteDatabase .execSQL("Create table activity ( ActivityId VARCHAR,Created VARCHAR,AMTaps_X VARCHAR,AMTemperature_X VARCHAR,AccountId VARCHAR,AccountLocation VARCHAR,AccountName VARCHAR,Classification VARCHAR,ActivityType VARCHAR,COTaps_X VARCHAR,COTemperature_X VARCHAR,Comment VARCHAR,ContactWorkPhone VARCHAR,CreatedByName VARCHAR,DSCycleNo_X VARCHAR,DSRouteNo_X VARCHAR,DSSequenceNo_X VARCHAR,Description VARCHAR,HETaps_X VARCHAR,HETemperature_X VARCHAR,Pro_Setup VARCHAR,LastUpdated VARCHAR,LastUpdatedBy VARCHAR,Licensee VARCHAR,MUTaps_X VARCHAR,MUTemperature_X VARCHAR,Objective VARCHAR,OwnerFirstName VARCHAR,OwnerLastName VARCHAR,PhoneNumber VARCHAR,Planned VARCHAR,PlannedCleanActualDt_X VARCHAR,PlannedCleanReason_X VARCHAR,PrimaryOwnedBy VARCHAR,Pro_Name VARCHAR,ServiceRepTerritory_X VARCHAR,ServiceRep_X VARCHAR,Status VARCHAR,Type VARCHAR,HEINDSTapAuditDate VARCHAR,HEINEmployeeType VARCHAR)"); Log.d("database","before insertion 3 "); int counter = 0; int size = arrayList.size(); for (counter = 0; counter < size; counter++) { ContentValues contentValues = (ContentValues) arrayList .get(counter); liteDatabase.insert("activity", "activityInfo", contentValues); Log.d("database", "Database insertion is done"); } }

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  • How to create custom get and set methods for Linq2SQL object

    - by optician
    I have some objects which have been created automatically by linq2SQL. I would like to write some code which should be run whenever the properties on these objects are read or changed. Can I use typical get { //code } and set {//code } in my partial class file to add this functionality? Currently I get an error about this member already being defined. This all makes sense. Is it correct that I will have to create a method to function as the entry point for this functionality, as I cannot redefine the get and set methods for this property. I was hoping to just update the get and set, as this would mean I wouldn't have to change all the reference points in my app. But I think I may just have to update it everywhere.

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  • create table based on a user defined type

    - by Glen
    Suppose I have a user defined type: CREATE OR REPLACE TYPE TEST_TYPE AS OBJECT ( f1 varchar2(10), f2 number(5) ); Now, I want to create a table to hold these types. I can do the following: create table test_type_table ( test_type_field test_type ); This gives me a table with one column, test_type_field. Is there an easy and automated way to instead create a table such that it has 2 columns, f1 and f2?. So that it's the equivilent to writing: create table test_type_table ( f1 varchar2(10), f2 number(5) );

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  • error in the syntax of cmd parameters

    - by KATy
    hi guyz in this method i m just adding the values to the db. temp is a object. the field value and variables in the object re havin the same name.. dono y this error s comin plz help me out... public virtual void Save_input_parameter_details(Test_Unit_BLL temp ) { SqlConnection con; con = new SqlConnection("Data Source=VV;Initial Catalog=testingtool;User ID=sa;Password=sa;"); con.Open(); SqlCommand cmd, cmd2, cmd3; //try //{ for (int i = 0; i < temp.No_Input_parameters; i++) { cmd2 = new SqlCommand("insert into Input_parameter_details values(@Input_Parameter_name,@Input_Parameter_datatype,@noparams,@class_code", con); cmd2.Parameters.AddWithValue("@Input_Parameter_datatype", temp.Input_Parameter_datatype[i]); cmd2.Parameters.AddWithValue("@Input_Parameter_name", temp.Input_Parameter_name[i]); cmd2.Parameters.AddWithValue("@noparams", temp.No_Input_parameters); cmd2.Parameters.AddWithValue("@class_code",temp.class_code); cmd2.ExecuteNonQuery(); } //} //catch (Exception ex) // { // MessageBox.Show("error"+ex); // } }

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  • MySQL query to view vertical data

    - by wenkhairu
    I have MySQL data that looks like this: +----------------------------------------+ |Name | kode | jum | +----------------------------------------+ | aman |kode1 | 2 | | aman |kode2 | 1 | | jhon |kode1 | 4 | | amir |kode2 | 4 | +--------------------+-----------+-------+ How can I make the table look like this one, using a MySQL query? kode1 kode2 count aman 2 1 3 jhon 0 4 4 amir 0 4 4

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  • Anyone have experience integrating with MYOB?

    - by 1nsane
    Looking to integrate a web application with MYOB. There's not much in terms of documentation out there. I've found a couple of companies that provide middleware, but nothing promising. Just thought I'd see if anyone else out there has had experience with this and might be able to save me a bit of time. Cheers

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  • Select from multiple tables, remove duplicates

    - by staze
    I have two tables in a SQLite DB, and both have the following fields: idnumber, firstname, middlename, lastname, email, login One table has all of these populated, the other doesn't have the idnumber, or middle name populated. I'd LIKE to be able to do something like: select idnumber, firstname, middlename, lastname, email, login from users1,users2 group by login; But I get an "ambiguous" error. Doing something like: select idnumber, firstname, middlename, lastname, email, login from users1 union select idnumber, firstname, middlename, lastname, email, login from users2; LOOKS like it works, but I see duplicates. my understanding is that union shouldn't allow duplicates, but maybe they're not real duplicates since the second user table doesn't have all the fields populated (e.g. "20, bob, alan, smith, [email protected], bob" is not the same as "NULL, bob, NULL, smith, [email protected], bob"). Any ideas? What am I missing? All I want to do is dedupe based on "login". Thanks!

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