How many Autoincrement columns are allowed in a single table?

Question

Each table can have only one AUTO_INCREMENT column. It must defined as a key (not necessarily the PRIMARY KEY or UNIQUE key). In some storage engines (including the default InnoDB), if the key consists of multiple columns, the AUTO_INCREMENT column must be the first column.

Can we have 2 auto increment in MySQL?

Only one numeric auto_increment value is allowed.

Can we have two auto increment columns?

You can't have two auto-increment columns.

How many columns can exist together per table?

SQL Server Database Engine objectMaximum values for SQL Server (64-bit)Columns per table1,024Columns per UPDATE statement4,096Columns per view1,024Connections per clientMaximum value of configured connections

How many auto increment column can be present per table in MySQL?

But unfortunately there can be only one AUTO_INCREMENT column per table in MySQL. :-/ So this situation belongs to a class of problems known as MAX+1 problems. (It may also be related to ROW_COUNT and LAST_INSERT_ID solutions.)

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