not-exists_开发者

Enter one record using 'if Not Exists'

I\'m trying to find one record in the Meeting table that contains the same Modified_user_id, assigned_user_id, Name, date_start,date_end, created_by as the record that\'s being saved. Th开发者_JS百科e[详细]

2023-04-03 22:33 分类：问答

MySql 5.1.32: call another procedure within a stored procedure and set variable

I\'m new at creating and working with stored procedures. After spending several hours on trying, reading tutorials (and yes reading all the related questions at stackoverflow :-) ) I\'m stuck.[详细]

2023-03-28 04:58 分类：问答

MySQL INSERT if one of primary key value doesn't match

I would like to do MySQL query like this: if((value1 != dbPrimaryValue1) OR (value2 != dbPrimaryValue2))[详细]

2023-02-19 04:57 分类：问答

How can I do an insert where not exists?

I\'d like to combine an insert query with a \"where not exists\" so as not to violate PK constraints. However, syntax such as the following gives me an Incorrect syntax near the keyword \'WHERE\' erro[详细]

2023-02-05 11:01 分类：问答

mysql: select all items from table A if not exist in table B

I am having prob开发者_如何学运维lem with selecting values from table a (id, room_name) where there are no corresponding events in table b (room_id, room_start, room_finish)[详细]

2023-02-03 12:19 分类：问答

what does this query mean

what does this query mean select fname, lname from Owner where not exists (select fname, lname from Trainer)[详细]

2023-01-31 04:41 分类：问答

SQL: check if a table contains no nulls in a particular column

I\'m working on a stored procedure and at one point I want to check my table variable to see if there are exactly zero rows with a specific field equal null. In other words, for every row in my table,[详细]

2023-01-23 10:15 分类：问答

Magento: addAttributeToFilter but ignore for products that don't have this attribute?

I\'m trying to show add some filters on my store, but they have a nasty side effect. Suppose I have product type A and B. Now I want to only show A where color = blue/red.[详细]

2023-01-09 23:08 分类：问答

PHP copy says file does not exist when it does

im using the following code; if( ! file_exists( $path ) ) { die( \"\'\" . $path . \"\' not vaild path\"); }[详细]

2023-01-06 18:47 分类：问答

SQL: not exist with openquery not working as expected

I do have an oracle 8 database from which I want to fetch data to SQL Server 2005. The following statement works fine, if the table on SQL Server 2005 is empty. If I run with let\'s say one entry miss[详细]

2023-01-05 14:02 分类：问答