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13 mar 2014 · There is no way to declare a global variable in Transact-SQL. However, if all you want your variables for is to be accessible across batches of a single script, you can use the SQLCMD tool or the SQLCMD mode of SSMS and define that tool/mode-specific variables like this:
8 lip 2024 · Although in earlier versions of SQL Server, the @@ functions are referred to as global variables, @@ functions aren't variables, and they don't have the same behaviors as variables. The @@ functions are system functions, and their syntax usage follows the rules for functions.
19 sie 2020 · Global variables are pre-defined system variables. It starts with @@. It provides information about the present user environment for SQL Server. SQL Server provides multiple global variables, which are very effective to use in Transact-SQL.
19 sie 2009 · SQL Server provides a massive number of global variables, which are very effective to use in our regular Transact-SQL. Global variables represent a special type of variable. The server always maintain the values of these variables.
The first thing to know about global variables in SQL is that they aren't variables (for these, read my separate tutorial). Instead, they are useful bits of infomation made available by SQL Server, which you can use. All global variables start with @@; all normal variables start with @.
28 cze 2024 · Global variable. The system maintains the global variable. A user cannot declare them. The global variable starts with @@ It stores session related information. How to DECLARE a variable in SQL. Before using any variable in batch or procedure, you need to declare the variable.
23 maj 2023 · Transact-SQL reference for using DECLARE to define local variables for use in a batch or procedure.
