Search Results

Search found 37200 results on 1488 pages for 'select option'.

Page 128/1488 | < Previous Page | 124 125 126 127 128 129 130 131 132 133 134 135  | Next Page >

  • Cannot have a qualifier in the select list while performing a JOIN w/ USING keyword.

    - by JuiceBerry123
    I am looking at a practice test that doesn't have explanations about the correct answers. The question I'm confused about basically asks why the following SQL statement can never work: SELECT oi.order_id, product_jd, order_date FROM order_items oi JOIN orders o USING(order_id); The answer it gave was: "The statement would not execute because the column part of the USING clause cannot have a qualifier in the SELECT list" Can someone elaborate on this? I am pretty stumped.

    Read the article

  • How do I add complex where clause to Zend Table Select?

    - by AD
    I searched the Web and could not find anything that would show me a good solid example. My question is basically this: How do I convert this: SELECT * FROM table WHERE ((a = 1 AND b = 2) OR (c = 3 OR c = 4)) AND d = 5; To Zend syntax similar to this: $this -select() -from($this-_schema.'.'.$this-_name) -where('a = ?', '1'); So how can it be done? Thank a lot in advance.

    Read the article

  • How would I duplicate the Rank function in a Sql Server Compact Edition SELECT statement?

    - by AMissico
    It doesn't look like SQL Server Compact Edition supports the RANK() function. (See Functions (SQL Server Compact Edition) at http://msdn.microsoft.com/en-us/library/ms174077(SQL.90).aspx). How would I duplicate the RANK() function in a SQL Server Compact Edition SELECT statement. (Please use Northwind.sdf for any sample select statements, as it is the only one I can open with SQL Server 2005 Management Studio.)

    Read the article

  • Can I select a set of rows from a table and directly insert that into a table or the same table in S

    - by VJ
    Hi I guess we cannot do this but was just curious if I could do something like - Select * from Employee where EmployeeId=1 and then use the data in the above statement and directly insert into a table with just changing the employeeid...or just this way- insert into Employee ( Select * from Employee where EmployeeId=1) its probably stupid from my side...but I just felt the need to do this a lot of times...so just was curious if there was any way to achieve it..

    Read the article

  • How to use Linq to select and group complex child object from a parents list.

    - by Daoming Yang
    How to use Linq to select and group complex child object from a parents list. I have an OrderList each of order object has a OrderProductVariantList(OrderLineList), and each of OrderProductVariant object has ProductVariant, and then the ProductVariant object will have a Product object which contains product information. My goal is to select and group the most popular products from the order list. Can anyone help me with this? Many thanks.

    Read the article

  • Is using joins in select clause slow in Oracle?

    - by gniquil
    I would like to write a query like the following select username, (select state from addresses where addresses.username = users.username) email from users This works in Oracle (assuming the result from the inner query is unique). However, is there a performance penalty associated with this style of writing query?

    Read the article

  • Are there any platforms where using structure copy on an fd_set (for select() or pselect()) causes p

    - by Jonathan Leffler
    The select() and pselect() system calls modify their arguments (the 'struct fd_set *' arguments), so the input value tells the system which file descriptors to check and the return values tell the programmer which file descriptors are currently usable. If you are going to call them repeatedly for the same set of file descriptors, you need to ensure that you have a fresh copy of the descriptors for each call. The obvious way to do that is to use a structure copy: struct fd_set ref_set_rd; struct fd_set ref_set_wr; struct fd_set ref_set_er; ... ...code to set the reference fd_set_xx values... ... while (!done) { struct fd_set act_set_rd = ref_set_rd; struct fd_set act_set_wr = ref_set_wr; struct fd_set act_set_er = ref_set_er; int bits_set = select(max_fd, &act_set_rd, &act_set_wr, &act_set_er, &timeout); if (bits_set > 0) { ...process the output values of act_set_xx... } } My question: Are there any platforms where it is not safe to do a structure copy of the struct fd_set values as shown? I'm concerned lest there be hidden memory allocation or anything unexpected like that. (There are macros/functions FD_SET(), FD_CLR(), FD_ZERO() and FD_ISSET() to mask the internals from the application.) I can see that MacOS X (Darwin) is safe; other BSD-based systems are likely to be safe, therefore. You can help by documenting other systems that you know are safe in your answers. (I do have minor concerns about how well the struct fd_set would work with more than 8192 open file descriptors - the default maximum number of open files is only 256, but the maximum number is 'unlimited'. Also, since the structures are 1 KB, the copying code is not dreadfully efficient, but then running through a list of file descriptors to recreate the input mask on each cycle is not necessarily efficient either. Maybe you can't do select() when you have that many file descriptors open, though that is when you are most likely to need the functionality.) There's a related SO question - asking about 'poll() vs select()' which addresses a different set of issues from this question.

    Read the article

  • Is it possible to mix a named pipe with select in perl?

    - by Haiyuan Zhang
    I need to write a daemon that supposed to have one TCP socket and one named pipe. Usually if I need to implement a multi IO server with "pure" sockets, the select based multi-IO model is always the one I will choose. so does anyone of you have ever used named pipe in select or you can just tell me it is impossible. thanks in advance.

    Read the article

  • How to select a row with a missing entry in historization?

    - by Viper
    from the following data basis i need to select all IDQ's which do not have an entry for the 11.11.2011. IDQ | DATE ---------------- 1 | 08.11.2011 1 | 09.11.2011 1 | 10.11.2011 1 | 12.11.2011 1 | 13.11.2011 i can't figure out how to express the sql select IDQ from TBL_WITH_IDQ T where not exists ( DATE = '11.11.2011' ) // sql does not the job Database is a Oracle 11g. maybe someone can help me?

    Read the article

  • How to update a table using a select group by in a second one and itself as the data source in MySQL

    - by Jader Dias
    I can do this: SELECT t2.value + sum(t3.value) FROM tableA t2, tableB t3 WHERE t2.somekey = t3.somekey GROUP BY t3.somekey But how to do this? UPDATE tableA t1 SET speed = ( SELECT t2.value + sum(t3.value) FROM tableA t2, tableB t3 WHERE t2.somekey = t3.somekey AND t1.somekey = t3.somekey GROUP BY t3.somekey ) ; MySQL says it's illegal since you can't specify target table t1 for update in FROM clause.

    Read the article

  • How do you keep the order using SELECT WHERE IN()?

    - by Pepper
    Is there a way to keep the order when using SELECT WHERE IN()? For example, using the following query: SELECT id FROM data_table WHERE id IN(56,55,54,1,7); The results will come back using the default order by id. 1,7,54,55,56 When I want to keep the order used in the IN: 56,55,54,1,7 Is there a quick way to do this in mySQL or will I be forced to order it after in code. Thanks :)

    Read the article

  • MYSQL trigger to select from and update the same table gives error #1241 - Operand should contain 1 column(s)

    - by Bipin
    when i try to select and update the same table mysql gives error error #1241 - Operand should contain 1 column(s) The trigger is DELIMITER $$ CREATE TRIGGER visitor_validation BEFORE INSERT ON ratingsvisitors FOR EACH ROW BEGIN SET @ifexists = (SELECT * FROM ratingcounttracks WHERE userid=New.vistorid AND likedate=New.likevalidation AND countfor=New.likeordislike); IF (@ifexists = NULL) THEN INSERT INTO ratingcounttracks(userid, likedate, clickcount,countfor) values (New.vistorid, New.likevalidation ,'1',New.likeordislike); ELSE UPDATE ratingcounttracks SET clickcount=clickcount+1 WHERE userid=New.vistorid AND likedate=New.likevalidation AND countfor=New.likeordislike; END IF; END$$

    Read the article

  • PL/SQL 'select in' from a list of values whose type are different from the outer query

    - by Attilah
    I have the following tables : Table1 ( Col1 : varchar2, Col2 : number, Col3 : number) Table2 ( Col1 : number, Col2 : varchar2, Col3 : varchar2) I want to run a query like this : select distinct Col2 from Table1 where Col1 in ( select Col1 from Table2 ) Table1.Col1 is of type varchar2 while Table2.Col1 is of type number. so, I need to do some casting, it seems but it fails to succeed. The problem is that any attempts to run the query returns the following error : ORA-01722: invalid number 01722. 00000 - "invalid number" *Cause: *Action: Table1.Col1 contains some null values.

    Read the article

  • [jquery/javascript] How select all checkboxes with class "xxx" ?

    - by marc
    Welcome, It it possible to select all checkboxes / uncheck all checkboxes what have class "xxx" ? I can't use "name" and "ID" because there are generated dynamical via PHP and i don't know their name. So maybye i can add class "xxx" for these what i wan't control ? Is is possible ? Or, if not possible. Maybye i can select all / unselect what are inside table with id "selectall" ? Regards

    Read the article

  • How do can I have a dropdown list(select HTML) where i want to have one of the options where i allow

    - by Mo
    Hi I want to have a drop down menu where a user can select from several predefined options but i also want to give him the option of inserting a user specific value, i was thinking having one of the options as "user specific" which will in turn allow the user to insert a user specif entry in a text box that appears or is editable when user selects the "user specific" option. any one have any ideas how i can implement this is HTML and Javascript? thank you

    Read the article

< Previous Page | 124 125 126 127 128 129 130 131 132 133 134 135  | Next Page >