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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: Example. UPDATE Customers. SET ContactName = 'Alfred Schmidt', City= 'Frankfurt' WHERE CustomerID = 1;
My use case was that I wanted to set a variable to a string. All the other answers here show how to set a variable using the output of a SELECT statement. Here's how to do it with a simple string: DECLARE @ModelID varchar(60) = 'Model T'
MySQL 9.1 Reference Manual / / Data Types / String Data Types / The SET Type. 13.3.7 The SET Type. A SET is a string object that can have zero or more values, each of which must be chosen from a list of permitted values specified when the table is created. SET column values that consist of multiple set members are specified with members ...
25 Σεπ 2023 · The SQL 'SET' statement is used to modify the values of specified columns in a table. It is commonly used in the UPDATE statement, which updates existing records in a table. General Syntax. SET column1 = value1, column2 = value2,...; SQL 'SET' in UPDATE Statement. The 'SET' command is most frequently used in the UPDATE statement.
SQL set operations combine the results of multiple query blocks into a single result. A query block, sometimes also known as a simple table, is any SQL statement that returns a result set, such as SELECT. MySQL 8.4 also supports TABLE and VALUES statements.
19 Ιουλ 2023 · These set operations allow you to combine, compare, or exclude data from multiple tables or result sets. The common set operations in SQL are: Union: The Union operation combines the result sets of two or more SELECT statements into a single result set, eliminating duplicate rows.
Selecting constants without referring to a table is perfectly legal in an SQL statement: SELECT 1, 2, 3. The result set that the latter returns is a single row containing the values. I was wondering if there is a way to select multiple rows at once using a constant expression, something kind of:
