where-clause

The following statements give the same result (one is using on , and the other using where ): mysql> select * from gifts INNER JOIN sentGifts ON gifts.giftID = sentGifts.giftID; mysql> select * from gifts INNER JOIN sentGifts WHERE gifts.giftID = sentGifts.giftID; I can only see in a case of a Left Outer Join finding the "unmatched" cases: (to find out the gifts that were never sent by anybody) mysql> select name from gifts LEFT OUTER JOIN sentgifts ON gifts.giftID = sentgifts.giftID WHERE sentgifts.giftID IS NULL; In this case, it is first using on , and then where . Does the on first do the

How do I construct a SQL query (MS SQL Server) where the "where" clause is case-insensitive? SELECT * FROM myTable WHERE myField = 'sOmeVal' I want the results to come back ignoring the case In the default configuration of a SQL Server database, string comparisons are case-insensitive. If your database overrides this setting (through the use of an alternate collation), then you'll need to specify what sort of collation to use in your query. SELECT * FROM myTable WHERE myField = 'sOmeVal' COLLATE SQL_Latin1_General_CP1_CI_AS Note that the collation I provided is just an example (though it will

Is there a method in Linq where you can use to build SQL strings like "...where (a=1) OR (a=2)"? You can certainly do it within a Where clause (extension method). If you need to build a complex query dynamically, though, you can use a PredicateBuilder . var query = collection.Where( c => c.A == 1 || c.B == 2 ); Or using a PredicateBuilder var predicate = PredicateBuilder.False<Foo>(); predicate = predicate.Or( f => f.A == 1 ); if (allowB) { predicate = predicate.Or( f => f.B == 1 ); } var query = collection.Where( predicate ); You can use the standard .NET boolean operators in your single