What is DECLARE in DBMS?

Question

DBMS DECLARE CONNECTION opens a session on a database engine. If the statement executes successfully, it allocates a connection structure and adds it to the list of open structures. Applications which must connect to two or more database servers should declare a named connection to each server.

What is declare in database?

Declares the name of a database.

What is declare mean in SQL?

The DECLARE statement is used to declare a variable in SQL Server. In the second step, we have to specify the name of the variable. Local variable names have to start with an at (@) sign because this rule is a syntax necessity. Finally, we defined the data type of the variable.

Why declare is used in SQL?

Variables in SQL procedures are defined by using the DECLARE statement. Values can be assigned to variables using the SET statement or the SELECT INTO statement or as a default value when the variable is declared. Literals, expressions, the result of a query, and special register values can be assigned to variables.

What is declaring variable?

Declaration of a variable in a computer programming language is a statement used to specify the variable name and its data type. Declaration tells the compiler about the existence of an entity in the program and its location. When you declare a variable, you should also initialize it.

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