where
Selecting from two tables, with different columns, where one needs a count
I have two tables, TableA and TableB. I need to select one count value from TableA, based on a where condition.[详细]
2022-12-20 20:40 分类：问答C# FindAll VS Where Speed
Anyone know any speed differences between Where and FindAll on List. I know Where is part of IEnumerab开发者_如何学Gole and FindAll is part of List, I\'m just curious what\'s faster.The FindAll method[详细]
2022-12-19 22:41 分类：问答SQL Query JOIN Performance
I wanted to know what is better performance-wise: to开发者_开发问答 put the conditions in the JOIN? (x JOIN y on x.hi = y.hi AND ....) or maybe to put it under the WHERE, and leave the JOIN only with[详细]
2022-12-18 13:38 分类：问答When to add index on joined tables
I have a mysql table with 9 million records that doesn\'t have any indices set.I need to join this to another table based on a common ID.I\'m going to add an index to this ID, but I also have other fi[详细]
2022-12-16 18:41 分类：问答How to add more than one WHERE statements in MySQL?
Can anyone give me some examples to make que开发者_StackOverflow社区ry which has more than one WHERE statements please?[详细]
2022-12-16 14:42 分类：问答Oracle OCI: Query with Date field
Client compiled with OCI: 10.2.0.4.0 Server: Oracle9i Enterprise Edition Release 9.2.0.4.0 The problematic query is:[详细]
2022-12-16 06:42 分类：问答Mysql SELECT narrowing search
EDIT:That was fast. The reason why I have this is because the table is a pivot table between 2 tables one has \"id\" as primary key and the other \"type\" primary key[详细]
2022-12-15 05:09 分类：问答Strange .Where() behaviour. Somebody has an explanation?
Original I don\'t get why the Where() clause doesn\'t give me the right results in the last example. It isn\'t any different is it? Why does C# behaves differently?[详细]
2022-12-12 23:05 分类：问答Linq To Sql 'Where Or' operator
I need to create a query which checks if a field (string) contains one or more words supplied at run time.[详细]
2022-12-12 06:45 分类：问答sql simple query
Yesterday my friend asked me a question about this query: select * from user where 1=1 I said that the query is incorrect, but he said i开发者_开发技巧t\'s correct. I don\'t understand how this qu[详细]
2022-12-11 10:25 分类：问答
加载中,请稍侯......