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5 gru 2016 · One option to do this is with PL/SQL-Package Variables: create or replace package steptest as procedure set(a number); function get return number; end; / create or replace package body steptest as x number; procedure set(a number) is begin x:=a; end; function get return number is begin return x; end; begin x:=0; end; /
19 sie 2020 · SQL Server provides multiple global variables, which are very effective to use in Transact-SQL. The following are some frequently used global variables –. @@SERVERNAME. @@CONNECTIONS. @@MAX_CONNECTIONS. @@CPU_BUSY. @@ERROR. @@IDLE. @@LANGUAGE. @@TRANCOUNT. @@VERSION. These are explained as following below. @@SERVERNAME :
8 lip 2024 · Set a value in a Transact-SQL variable. 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.
Use the SHOW GLOBAL VARIABLES statement to show all global variables. Use the SHOW GLOBAL VARIABLES LIKE variable_name or SELECT @@variable_name to display the current value of the variable_name; Use the SET GLOBAL variable_name = value to set a new value for the variable_name.
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 @.
18 lis 2019 · SQL Server offers two different methods to assign values into variables except for initial value assignment. The first option is to use the SET statement and the second one is to use the SELECT statement.
16 sie 2023 · Declaring a Single SQL Variable. The T-SQL syntax for declaring a variable in SQL Server is as follows: DECLARE @variable_name data_type [= value]; Declare statement. @variable_name = variable's name. data_type = variable's data type. Value is an (optional) initial value to assign to the variable value.
