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23 lis 2011 · DECLARE select_var VARCHAR(SIZE); SET select_var = (SELECT name FROM table WHERE id = i); RETURN select_var; END$$ try to specify the size of char return type. for example if name can be of 20 characters then try. Thanks!! Thought that just setting CHAR would be automatic.
21 cze 2024 · The MySQL SELECT statement uses various clauses like WHERE, GROUP BY, ORDER BY, etc. We can also use aggregate functions like SUM, COUNT, etc with SELECT statements to summarize data. Syntax: The Basic Syntax of the MySQL SELECT Statement is as follows: SELECT column1, column2, ... FROM table_name. WHERE condition. ORDER BY column_name [ASC | DESC]
SELECT t1.name, t2.salary FROM employee AS t1, info AS t2 WHERE t1.name = t2.name; SELECT t1.name, t2.salary FROM employee t1, info t2 WHERE t1.name = t2.name; Columns selected for output can be referred to in ORDER BY and GROUP BY clauses using column names, column aliases, or column positions.
The MySQL SELECT Statement. The SELECT statement is used to select data from a database. The data returned is stored in a result table, called the result-set. SELECT Syntax
Expressions can be used at several points in SQL statements, such as in the ORDER BY or HAVING clauses of SELECT statements, in the WHERE clause of a SELECT, DELETE, or UPDATE statement, or in SET statements.
Expressions can be written using values from several sources, such as literal values, column values, NULL, variables, built-in functions and operators, loadable functions, and stored functions (a type of stored object).
Use a SELECT statement or subquery to retrieve data from one or more tables, object tables, views, object views, materialized views, analytic views, or hierarchies.
