Αποτελέσματα Αναζήτησης
2 Ιουλ 2013 · For MySQL, please take a look this example code:-- Init variables SET @var1 = 0; SET @var2 = 0; SET @var3 = 0; SELECT VALUE1, VALUE2, VALUE3 INTO @var1, @var2, @var3 FROM COOL_TABLE WHERE VALUE_ID = 12345; -- Then you can use declared variables SELECT * FROM ANOTHER_TABLE WHERE VALUE1 = @var1 AND VALUE2 = @var2
18 Αυγ 2014 · Is there a way to set all variables with one set statment, like you can with a declare statement? For example: Declare @Test VARCHAR(10), @Test2 VARCHAR(10), @Test3 INT. SET @Test = 'test'. SET @Test2 = 'Test2'. SET @Test3 = 1.
16 Αυγ 2023 · For example, the below SQL code declares three variables @AvgUnitPrice, @AvgOrderQty, and @AvgLineTotal. The SELECT statement calculates the unit Price, Order Quantity, and Line Total average. These calculated values are assigned to the variables.
SET. The SET command is used with UPDATE to specify which columns and values that should be updated in a table. The following SQL updates the first customer (CustomerID = 1) with a new ContactName and a new City:
SET syntax for variable assignment enables you to assign values to different types of variables that affect the operation of the server or clients: User-defined variables. See Section 11.4, “User-Defined Variables”. Stored procedure and function parameters, and stored program local variables. See Section 15.6.4, “Variables in Stored Programs”.
SET Statement Assigns a new value to a previously declared variable. The new value does not need to be of the same type as the previous value. It is an error to assign a value to an undeclared variable. Use the DECLARE statement to declare variables. Syntax. SET variable-name = new-value; Parameters. variable-name: identifier
29 Νοε 2022 · When assigning values to multiple @variables in one SELECT statement, when one @variable is dependent on another, the order in which the @variables appear in the statement changes the outcome. For example:-DECLARE @a INT; DECLARE @b INT; SET @a = 0; SET @b = 0; SELECT @a = 3, @b = 5 - @a; SELECT '@a before @b' AS Test, @a AS [Value Of @a], @b ...
