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Update all varchar column rows to display values before slash in MySQL?
For this, use UPDATE command along with SUBSTRING_INDEX(). Let us first create a table −
mysql> create table demo69 −> ( −> name varchar(40) −> ); Query OK, 0 rows affected (5.04 sec)
Insert some records into the table with the help of insert command −
mysql> insert into demo69 values('John/Smith');
Query OK, 1 row affected (0.83 sec)
mysql> insert into demo69 values('David/Miller');
Query OK, 1 row affected (0.23 sec)
mysql> insert into demo69 values('Chris/Brown');
Query OK, 1 row affected (0.40 sec)
mysql> insert into demo69 values('Carol/Taylor');
Query OK, 1 row affected (0.36 sec)Display records from the table using select statement −
mysql> select *from demo69;
This will produce the following output −
+--------------+ | name | +--------------+ | John/Smith | | David/Miller | | Chris/Brown | | Carol/Taylor | +--------------+ 4 rows in set (0.03 sec)
Following is the query to update all varchar column rows −
mysql> update demo69 −> set name=substring_index(name,'/',1); Query OK, 4 rows affected (0.13 sec) Rows matched: 4 Changed: 4 Warnings: 0
Display records from the table using select statement −
mysql> select *from demo69;
This will produce the following output −
+-------+ | name | +-------+ | John | | David | | Chris | | Carol | +-------+ 4 rows in set (0.00 sec)
Updated on: 20-Nov-2020
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