Syntax error How to make MySQL table primary key auto increment?

How to make MySQL table primary key auto increment?

To make MySQL table primary key auto increment, use the below syntax

CREATE TABLE yourTableName
   (
   yourColumnName INT(6) ZEROFILL NOT NULL AUTO_INCREMENT,
   PRIMARY KEY(yourColumnName)
   );

Let us first create a table and set primary key auto increment −

mysql> CREATE TABLE DemoTable
   (
   UserId INT(6) ZEROFILL NOT NULL AUTO_INCREMENT,
   PRIMARY KEY(UserId)
   );
Query OK, 0 rows affected (0.81 sec)

Insert some records in the table using insert command −

mysql> INSERT INTO DemoTable values();
Query OK, 1 row affected (0.12 sec)

mysql> INSERT INTO DemoTable values();
Query OK, 1 row affected (0.13 sec)

mysql> INSERT INTO DemoTable values();
Query OK, 1 row affected (0.10 sec)

mysql> INSERT INTO DemoTable values();
Query OK, 1 row affected (0.44 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output −

+--------+
| UserId |
+--------+
| 000001 |
| 000002 |
| 000003 |
| 000004 |
+--------+
4 rows in set (0.00 sec)
Updated on: 2019-07-30T22:30:26+05:30

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