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• Randomly selecting a limited number of records with two conditions in MySQL

  - by andyashton

  I have a MySQL table with a column called "priority". The column can have two values: high or low. I want to select 8 records from the table at random, but I want 6 of them to be high priority, and 2 of them to be low priority. If possibly, I would like to do it in one SQL statement. Is there any way to do two LIMITS in one query based on this kind of criteria?

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• NHibernate find

  - by Cory

  I have a 'Customer' table with 'FirstName' and 'LastName' columns. I have to execute a search on the 'Customer' table after 'FirstName', 'LastName' and 'FirstName + LastName' depending on a TextBox text. What's the besty way/query to implement this using NHibernate or SQL query?

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• Fetching Cassandra row keys

  - by knorv

  Assume a Cassandra datastore with 20 rows, with row keys named "r1" .. "r20". Questions: How do I fetch the row keys of the first ten rows (r1 to r10)? How do I fetch the row keys of the next ten rows (r11 to r20)? I'm looking for the Cassandra analogy to: SELECT row_key FROM table LIMIT 0, 10; SELECT row_key FROM table LIMIT 10, 10;

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• SQL Server dilemma, performance

  - by Woland

  Hello I am creating app where user can save options witch one is better? to save into user table varchar feeld smthing like ('1,23,4354,34,3') query for this is select * from data where CHARINDEX ( 'L', Providers , 0 ) 0 create other table where user options are and just add rows select * from data where Providers in (select Providers from userdata where userid=100) thanks for help

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• rollback not working in mysql

  - by Bharanikumar

  i have user table, i have 5 records , i delete two records , then executed the rollback command, rollback command executed successfully. But that deleted two records not recovered , user table engine is innodb...

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• SQL Server > Query > Column Names

  - by pojomx

  Hi, I'm here again- I have something like this Select A.a, A.b, A.a+A.b as c, (A.a+A.b*2)+A.d as d from Table But i want to know, if it is possible, to make it work with something like this: Select A.a,A.b,A.a+A.b as c, (c*2)+A.d as d from Table Thank you

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• MySQL: NOW() giving me zeros

  - by Tunji Gbadamosi

  I have a table which I want to record the timestamp of every order at every insertion time. However, I'm getting zero values for the timestamps. Here's my schema: CREATE TABLE IF NOT EXISTS orders( order_no VARCHAR(16) NOT NULL, volunteer_id VARCHAR(16) NOT NULL, date TIMESTAMP DEFAULT NOW(), PRIMARY KEY (order_no), FOREIGN KEY (volunteer_id) REFERENCES volunteer(id) ON UPDATE CASCADE ON DELETE CASCADE)

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• MySQL: How to do a conditional update?

  - by Tom

  Hi, I'm trying to a create an update statement along the following lines: TABLE car: id | owner_id | type | status An owner can have multiple cars. UPDATE car c SET c.type = 1 WHERE c.owner_id IN ($ids) AND c.status = [1 IF IT EXISTS, ELSE 0] $ids is reasonably small (under 50 values). It seems simple but I can't seem to get my head around it because I can't use a SELECT subquery with an UPDATE to the same table. Anyone? Thanks

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• Copy huge tables data from one database to another in SQL Server.

  - by Narasimhulu

  I have two database say DB_A and DB_B. In DB_A database, table having huge data (few tables are having 2 to 10 million data). I want to move the all table data from DB_A to DB_B database. Please help me on writing stored procedures to move efficiently (fast) the data from one database to another.

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• New help with SQL Server select statement

  - by gio_333m

  I need help with select statement in SQL Server / T-SQL My table looks like this: Id (int) QuestionId (int) GenreId (int) I want to select random N rows from this table so that maximum number of same GenreId in the result set is less than X for all GenreId-s except one. For that one GenreId, I need row count with that GenreId to be equal to Y.

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• selection of drop down restriction on association tables

  - by venkatakrishna

  hello ! languages table(languagename,languagecode(pk),part); parts table(subjectype,part(pk)); I want to access only perticular subject type into drop downs... How can i do this.

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• sql delete from start

  - by Luke

  Is there anyway I can restrict the amount of rows allowed in a table to say 40, and then when 41st is added, the table deletes the first one?

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• How to read large number of rows efficiently using Zend_Db?

  - by Alex N.

  Is there a simple :) and efficient way or reading very large number of rows sequentially using Zend_Db? Basically I need to process entire table, row by row. Table is large, primary key sequence is not guaranteed(i.e. not an autoincrement, but is UNSIGNED INT). What's the best way to approach this? Environment: PHP 5.2, Zend Framework 1.10, MySQL 5.1

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• regular expression breaking on new line

  - by shyam

  I'm trying to use a regular expression as below: preg_match_all('|<table.*</table>|',$html,$matches, PREG_SET_ORDER); But this is not working, and I think the problem is the new line inside the string $html. Could someone tell me a work around?

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• sql - Update Trigger to populate a ModifyDate field

  - by hamlin11

  I'm looking for an example of a good update trigger to update the ModifyDate field of a table. It would be nice to handle the case where an update command updated more than one record in the table. Is there a good template or tutorial for this? Thanks

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• How do I check to see if a column is in an xsd?

  - by Timmy

  Is there a simple way to see if the xsd code generating C# code has a particular column? Or if you can reference a variable column? table.getColumn("column") instead of table.column?

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• How to insert data only if data doesn't already exist in MYSQL?

  - by Lost_in_code

  This is what I'm doing right now: Execute a query and check if the date to be inserted already exists in a table. If date doesn't exist: Another query will insert the date into the table. How can these two query be combined?

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• chaining and getting the value of an input

  - by cf_PhillipSenn

  This code gets the text that's in a certain column of a table row: var keyA = $(a).children('td').eq(column).text().toUpperCase(); Q: How do I rewrite this to get the value of an input tag that's in the table cell? var keyA = $(a).children('td').eq(column).('input').val().toUpperCase();

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• LOAD DATA LOCAL INFILE custom value

  - by NR03

  How to add a custom value using LOAD DATA LOCAL INFILE? The column time_added is the 7th column and the file has only 2 values for the first and the second column. For the 7th column, time_added I want to use the unix timestamp when loading from file. This code isn't working: $result = mysql_query("LOAD DATA LOCAL INFILE '{$myFile}' INTO TABLE {$table} FIELDS TERMINATED BY ':' LINES TERMINATED BY '\n' SET `time_added`=unix_timestamp()");

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• [MYSQL] select statement that combines similar rows with certain ids ?

  - by vegatron

  hi I have a warehouse_products table which defines how many products in the warehouses so lets say I have 20 records/rows in the table, some rows may contain the same product id but in a different warehouse I need to create select statement that give every product one row, and in this row I must have the quantity in warehouse A and warehouse B .. so in the end I will get for example 10 rows that contain all the data id domain_id warehouse_id wh_product_id quantity 2 1 2 2 84 3 1 1 3 221 4 1 3 3 0 5 1 1 3 14 6 1 1 2 73 7 1 1 1 123

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• Is this select possible in sql?

  - by chandru_cp

  Consider a table, Id columnA 1 a 2 b 3 c Select ColumnA from table gives the result as below, columnA a b c Is it possible to get ColumnA a,b,c

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• T-SQL Query to Get SUM(COUNT())

  - by Ted

  Hi, I am planning to get a report for a table with following table structure: ID RequestDate ----------------------------- 1 2010/01/01 2 2010/02/14 3 2010/03/20 4 2010/01/07 5 2009/03/31 I want the results as: I D_Count RequestDate Sum ----------------------------------------- 2 2010/01 2 1 2010/02 3 2 2010/03 5 Pls help.

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• error on ExecuteNoQuery()

  - by AZIRAR

  hey, i'am trying to update a row in a table using : command.ExecuteNoQuery() it's not giving me an error but it's not updating the row This is my code : Dim req As String = "Update Table Set Id= 5" Dim cmd As New OleDb.OleDbCommand(req, connect()) cmd.ExecuteNonQuery() disconnect() thanks

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• Rails - single ID for multiple models

  - by user352351

  I'm building an app which will allow a user to scan the barcode on a 'shelf', 'box' or 'product' which will then bring up that particular item or all the associated items. As these are all separate models with their own ID's, I need a global ID table. I was thinking of a polymorphic table called 'barcodes' barcodes id barcode_number barcodable Is there an easy way to do this? Or is polymorphic the best way?

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• Make a set from CSV values in TSQL

  - by rossfabricant

  If I want to see which values from an Excel spreadsheet column don't match values in a table, I can easily create a table with Bulk Import. Is there a simpler way? EG, I want to do a query like: select into #temp from ('a', 'b', 'c') as 'Id' select * from #temp where Id not in (select Id from MyTable)

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