
- Learn MySQL
- MySQL - Home
- MySQL - Introduction
- MySQL - Installation
- MySQL - Administration
- MySQL - PHP Syntax
- MySQL - Connection
- MySQL - Create Database
- MySQL - Drop Database
- MySQL - Select Database
- MySQL - Data Types
- MySQL - Create Tables
- MySQL - Drop Tables
- MySQL - Insert Query
- MySQL - Select Query
- MySQL - Where Clause
- MySQL - Update Query
- MySQL - Delete Query
- MySQL - Like Clause
- MySQL - Sorting Results
- MySQL - Using Join
- MySQL - NULL Values
- MySQL - Regexps
- MySQL - Transactions
- MySQL - Alter Command
- MySQL - Indexes
- MySQL - Temporary Tables
- MySQL - Clone Tables
- MySQL - Database Info
- MySQL - Using Sequences
- MySQL - Handling Duplicates
- MySQL - SQL Injection
- MySQL - Database Export
- MySQL - Database Import
How to use a select statement while updating in MySQL?
For this, use sub query along with WHERE clause while using the MySQL UPDATE command. Let us first create a table −
mysql> create table DemoTable -> ( -> Id int, -> Name varchar(20) -> ); Query OK, 0 rows affected (0.82 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values(100,'Chris'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values(250,'David'); Query OK, 1 row affected (0.25 sec) mysql> insert into DemoTable values(150,'Mike'); Query OK, 1 row affected (0.12 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+------+-------+ | Id | Name | +------+-------+ | 100 | Chris || 250 | David | | 150 | Mike | +------+-------+ 3 rows in set (0.00 sec)
Here is the query to use a select statement while updating −
mysql> update DemoTable -> set Name='Robert' -> where Id in -> ( -> select *from ( select max(Id) from DemoTable ) tbl1 -> ); Query OK, 1 row affected (0.27 sec) Rows matched: 1 Changed: 1 Warnings: 0
Let us check the table records once again −
mysql> select *from DemoTable;
This will produce the following output −
+------+--------+ | Id | Name | +------+--------+ | 100 | Chris | | 250 | Robert | | 150 | Mike | +------+--------+ 3 rows in set (0.00 sec)
- Related Articles
- How to use NULL in MySQL SELECT statement?
- How to use the CAST function in a MySQL SELECT statement?
- How to use custom variable while updating a MongoDB document?
- How to use MySQL CASE statement while using UPDATE Query?
- How to use prepared statement for select query in Java with MySQL?
- Can we use SELECT NULL statement in a MySQL query?
- How can I use MySQL IF() function within SELECT statement?
- How can we use MySQL SELECT statement to count number of rows in a table?
- How can we use SET statement to assign a SELECT result to a MySQL user variable?
- MySQL case statement inside a select statement?
- Add a percentage (%) sign at the end to each value while using MySQL SELECT statement
- How to create Tab Delimited Select statement in MySQL?
- How can I use a SELECT statement as an argument of MySQL IF() function?
- How to call a stored procedure using select statement in MySQL?
- Explain the use of SELECT DISTINCT statement in MySQL using Python?

Advertisements