How do I DECLARE a string in SQL?

How do I DECLARE varchar?

Example - Declare a variable For example: DECLARE @techonthenet VARCHAR(50); This DECLARE statement example would declare a variable called @techonthenet that is a VARCHAR datatype, with a length of 50 characters.

How do you assign a string value to a variable in SQL?

When a variable is first declared, its value is set to NULL. To assign a value to a variable, use the SET statement. This is the preferred method of assigning a value to a variable. A variable can also have a value assigned by being referenced in the select list of a SELECT statement.

What is DECLARE in SQL?

The DECLARE statement initializes a variable by assigning it a name and a data type. The variable name must start with the @ sign. In this example, the data type of the @model_year variable is SMALLINT . By default, when a variable is declared, its value is set to NULL .

How do I DECLARE a variable in SQL script?

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.