The main advantage of a join is that it executes faster. The performance increase might not be noticeable by the end user. However, because the columns are specifically named and indexed and optimized by the database engine, the retrieval time almost always will be faster than that of a subquery. There are also inner and outer joins, left and right joins, full joins and cross joins.
Chat with our AI personalities
T-SQL is Microsoft's version of the generic SQL langauge to be used with, for example, Microsoft SQL Server.
In SQL, the function of the union operator is to combine the result of two or more select-statements. The union operator is a very useful tool when coding SQL.
hyghghghghgh
(.) Period
gand maro...is the answer