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# SQL_Server
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######Microsoft SQL Server is a relational database management system developed by Microsoft. As a database server, it is a software product with the primary function of storing and retrieving data as requested by other software applications—which may run either on the same computer or on another computer across a network.
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## Microsoft SQL Server is a relational database management system developed by Microsoft. As a database server, it is a software product with the primary function of storing and retrieving data as requested by other software applications—which may run either on the same computer or on another computer across a network.
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DML stands for data manipulation language, and it's that vocabulary of standard T-SQL commands that you already know that attempt to retrieve data, modify data, or manipulate it, things like SELECT and INSERT and UPDATE and DELETE. Data in a relational database is stored within tables, a concept we're used to, and DML triggers watch for data manipulation events. So inserting, updating, and deleted.
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##### After & Instead of Triggers
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Within SQL Server, there are two kinds of triggers, INSTEAD OF and AFTER triggers. In almost every way, they really are the same. The only difference is where and when they do their work, but they're working on the same data. So first, let's review the similarities and then look at their differences.
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