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Update a table based on StudentId value in MySQL?
Let us first create a table −
mysql> create table DemoTable633 (StudentId char(2) not null primary key,StudentName varchar(100)); Query OK, 0 rows affected (1.06 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable633 values('10','Chris'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable633 values('20','Sam'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable633 values('30','David'); Query OK, 1 row affected (0.17 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable633;
This will produce the following output −
+-----------+-------------+ | StudentId | StudentName | +-----------+-------------+ | 10 | Chris | | 20 | Sam | | 30 | David | +-----------+-------------+ 3 rows in set (0.00 sec)
Let us now update the above table based on StudentID using UPDATE −
mysql> update DemoTable633 set StudentName='Bob' where StudentId='20'; Query OK, 1 row affected (0.13 sec) Rows matched: 1 Changed: 1 Warnings: 0
Let us check the table records once again −
mysql> select *from DemoTable633;
This will produce the following output −
+-----------+-------------+ | StudentId | StudentName | +-----------+-------------+ | 10 | Chris | | 20 | Bob | | 30 | David | +-----------+-------------+ 3 rows in set (0.00 sec)
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