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How to add a leading zero to some values in a column in MySQL?
To add leading zero to some value, use the LPAD() function of MySQL. The syntax is as follows −
select lpad(yourColumnName, lengthofColumnValue+1,0) from yourTableName;
Here is an example of LPAD().
mysql> select lpad('98765432',9,0);The following is the output −
+----------------------+
| lpad('98765432',9,0) |
+----------------------+
| 098765432 |
+----------------------+
1 row in set (0.00 sec)To check it in a live example, let us first create a table −
mysql> create table leadingZeroDemo −> ( −> Id varchar(200) −> ); Query OK, 0 rows affected (0.63 sec)
Now insert some records into the table with the help of insert command. The query is as follows −
mysql> insert into leadingZeroDemo values('2345');
Query OK, 1 row affected (0.17 sec)
mysql> insert into leadingZeroDemo values('1234');
Query OK, 1 row affected (0.16 sec)
mysql> insert into leadingZeroDemo values('9876');
Query OK, 1 row affected (0.14 sec)
mysql> insert into leadingZeroDemo values('4321');
Query OK, 1 row affected (0.13 sec)Display how many records are present in the table. The query to display all records.
mysql> select *from leadingZeroDemo;
The following is the output −
+------+ | Id | +------+ | 2345 | | 1234 | | 9876 | | 4321 | +------+ 4 rows in set (0.00 sec)
Apply the LPAD() function to add leading zero. The query to add leading zero is all follow −
mysql> select lpad(Id,5,0) from leadingZeroDemo;
The following is the output that adds leading zero −
+--------------+ | lpad(Id,5,0) | +--------------+ | 02345 | | 01234 | | 09876 | | 04321 | +--------------+ 4 rows in set (0.00 sec)
Updated on: 29-Jun-2020
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