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How to update multiple rows and left pad values in MySQL?
Use the LPAD() function to left pad values. Let us first create a table −
mysql> create table DemoTable -> ( -> Number int -> ); Query OK, 0 rows affected (2.26 sec
Insert some records in the table using insert command −
mysql> insert into DemoTable values(857786); Query OK, 1 row affected (0.26 sec) mysql> insert into DemoTable values(89696); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values(89049443); Query OK, 1 row affected (0.25 sec
Display all records from the table using select statement −
mysql> select *from DemoTable;
Output
This will produce the following output −
+----------+ | Number | +----------+ | 857786 | | 89696 | | 89049443 | +----------+ 3 rows in set (0.00 sec)
Following is the query to update multiple rows and left pad values −
mysql> update DemoTable set Number=LPAD(Number, 7, "9") where length(Number) < 7; Query OK, 2 rows affected (0.40 sec) Rows matched: 2 Changed: 2 Warnings: 0
Let us check table records once again −
mysql> select *from DemoTable;
Output
This will produce the following output −
+----------+ | Number | +----------+ | 9857786 | | 9989696 | | 89049443 | +----------+ 3 rows in set (0.00 sec)
Updated on: 30-Jun-2020
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