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Update existing column data in MySQL and remove the last string from a varchar column with strings and numbers
Let us first create a table −
mysql> create table DemoTable ( Download varchar(100) ); Query OK, 0 rows affected (0.53 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values('120 Gigabytes');
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable values('190 Gigabytes');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable values('250 Gigabytes');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable values('1000 Gigabytes');
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 −
+----------------+ | Download | +----------------+ | 120 Gigabytes | | 190 Gigabytes | | 250 Gigabytes | | 1000 Gigabytes | +----------------+ 4 rows in set (0.00 sec)
Following is the query to update existing column data and remove the last string −
mysql> update DemoTable set Download=LEFT(Download, INSTR(Download, ' ') - 1); Query OK, 4 rows affected (0.16 sec) Rows matched: 4 Changed: 4 Warnings: 0
Let us check the table records once again −
mysql> select *from DemoTable;
This will produce the following output −
+----------+ | Download | +----------+ | 120 | | 190 | | 250 | | 1000 | +----------+ 4 rows in set (0.00 sec)
Updated on: 25-Sep-2019
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