MySQL 如何使用查询填充或填充零列

您可以使用ZEROFILL对列进行填充或填充零。让我们首先创建一个表−

mysql> create table DemoTable
   (
   Number int
   );
Query OK, 0 rows affected (0.58 sec)

以下是为Number列添加zerofill属性的查询−

mysql> alter table DemoTable change Number Number int(10) zerofill not null;
Query OK, 0 rows affected (1.13 sec)
Records: 0 Duplicates: 0 Warnings: 0

使用insert命令将记录插入表中−

mysql> insert into DemoTable values(1);
Query OK, 1 row affected (0.23 sec)
mysql> insert into DemoTable values(12);
Query OK, 1 row affected (0.53 sec)
mysql> insert into DemoTable values(123);
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable values(1234);
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable values(12345);
Query OK, 1 row affected (0.15 sec)

使用select语句从表中显示所有记录−

mysql> select *from DemoTable;

这将产生以下输出−

+------------+
| Number     |
+------------+
| 0000000001 |
| 0000000012 |
| 0000000123 |
| 0000001234 |
| 0000012345 |
+------------+
5 rows in set (0.00 sec)

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