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Book Overview & Buying
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Table Of Contents
SQL Server 2016 Developer's Guide
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As a developer, you are often also responsible to create database objects. Of course, in an application, you also need to insert, update, and delete the data. In order to maintain data integrity, enforcing data complies with business rules, you need to implement constraints. In a quick review of the data definition language (DDL) and data modification language (DML) elements, the following statements are presented:
CREATE for creating tables and programmatic objectsALTER to add constraints to a tableDROP to drop an objectINSERT to insert new dataUPDATE to change existing dataDELETE to delete the dataIn a SQL Server database, you can also use programmatic objects. You can use triggers for advanced constraints or to maintain redundant data like aggregated data. You can use other programmatic objects for data abstraction, for an intermediate layer between the actual data and an application. The following programmatic objects are introduced here: