UNION operator makes it possible to connect 2 results of query and remove all existing duplicities in them. In other words, operator actually performs DISTINCT in final unification of...
IN operator in t-sql is used in cases where we need to specify a condition e.g in WHERE clause to multiple discrete values at once. It is similar to...
This operator is used in SQL whenever it is needed to prove if certain value belongs to some range. This operator is used together with “AND” command which defines...
EXISTS is a T-SQL operator which can be used to test existence of a result in subquery. Based on that it can perform query or some task. Sql EXISTS...
This operator can find string of text based on a certain pattern. It is most usually used in clause WHERE. But it can be applied in any part of...