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2 weeks ago
How do I declare a variable in MySQL?
User-defined variables (prefixed with @ ): SELECT @start := 1, @finish := 10; SELECT * FROM places WHERE place BETWEEN @start AND @finish; User variables can be assigned a value from a limited set of data types: integer, decimal, floating-point, binary or nonbinary string, or NULL value. 1 авг. 2012 г.
How do you DECLARE a variable in a database?
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.
How do you DECLARE a variable example?
// Example 4-1: Variable declaration and initialization examples int count = 0; // Declare an int named count, assigned the value 0 char letter = 'a'; // Declare a char named letter, assigned the value 'a' double d = 132.32; // Declare a double named d, assigned the value 132.32 boolean happy = false; // Declare a ...
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