A check constraint is a condition that must be true for every row in a table. It is defined as part of the table definition using the CHECK keyword. You can specify one or more check constraints ...

In this article, you will learn how to manage index or constraint dependencies or changes in SQL ... tables. If you drop an index, you may degrade the performance of the queries or the code that ...

If your business uses relational databases to store data, it helps to use the SQL SELECT command with the INTO clause to create new tables from query results. This method isn't ANSI-standard SQL ...

Generally though, you can use any text editor to create a design-time artifact ... enable you to view the contents of the catalog. An SQL constraint specifies rules for the data stored in a database ...

You can create a new SAS, DB2, or other database management system table from your output; see Creating New Tables for details You can save the SQL query to a catalog entry of type SQL. You can save ...

When designing objects in SQL Server ... in unique index tables then delete the duplicate records. First, we need to create a database named “test_database”, then create a table “ Employee” with a ...

You use the CONSTRAINT clause in ALTER TABLE and CREATE TABLE statements to create or delete constraints. There are two types of CONSTRAINT clauses: one for creating a constraint on a single field and ...