What does exec mean in sql

The EXEC command in SQL is used to execute stored procedures or dynamic SQL statements. It enables automated tasks, dynamically generates queries, and enhances procedurality by executing precompiled stored procedures, or generating and executing SQL queries at runtime.

The meaning of EXEC in SQL

The EXEC command in SQL is used to execute stored procedures or dynamic SQL statements.

Detailed description:

The name of the EXEC command followed by a stored procedure or dynamic SQL statement. A stored procedure is a set of precompiled Transact-SQL (T-SQL) statements that can be executed multiple times without recompiling. Dynamic SQL statements are SQL statements generated at runtime, allowing queries to be modified based on input parameters at runtime.

The syntax of the EXEC command is as follows:

 <code>EXEC [schema_name.]stored_procedure_name [parameter_list]</code>

or:

 <code>EXEC(@dynamic_sql_variable)</code>

parameter:

• schema_name: The name of the schema in which the stored procedure resides (optional).
• stored_procedure_name: The name of the stored procedure to be executed.
• parameter_list: The parameter list (optional) passed to the stored procedure.
• @dynamic_sql_variable: A variable containing the dynamic SQL statement to be executed.

Example:

Execute stored procedures:

 <code class="sql">EXEC Sales.GetCustomers</code>

Execute dynamic SQL statements:

 <code class="sql">DECLARE @sql NVARCHAR(MAX) = 'SELECT * FROM Sales WHERE CustomerID = 1' EXEC(@sql)</code>

The EXEC command can be used in the following scenarios:

• Automation Tasks: Automate repetitive tasks such as data insertion, update, and delete by performing stored procedures.
• Dynamically generate query: Generate SQL queries at runtime based on user input or other dynamic conditions.
• Enhanced procedural: Implement procedural logic in T-SQL scripts by calling stored procedures or dynamic SQL statements.

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