Create row in table with only auto generated fields - SQL

Question

I've got the following table:

CREATE TABLE "MIGRATION"."VERSION"
(
ID BIGINT PRIMARY KEY NOT NULL GENERATED BY DEFAULT AS IDENTITY,
VERSION_DATE timestamp DEFAULT CURRENT TIMESTAMP NOT NULL
)

I would like to insert a "new row" in that table but since everything is autogenerated, how could I do this?

INSERT INTO "MIGRATION"."VERSION" VALUES();

isn't working. This has to be done and can't be changed.

Answer 1

The SQL standard and most databases support the DEFAULT VALUES clause for this:

INSERT INTO "MIGRATION"."VERSION" DEFAULT VALUES;

This is supported in

• CUBRID
• Firebird
• H2
• HSQLDB
• Ingres
• PostgreSQL
• SQLite
• SQL Server
• Sybase SQL Anywhere

If the above is not supported, you can still write this statement as a workaround. In fact, the first is specified by the SQL standard to be equivalent to the second:

INSERT INTO "MIGRATION"."VERSION" (ID, VERSION_DATE) VALUES (DEFAULT, DEFAULT);

This will then also work with:

• Access
• DB2
• MariaDB
• MySQL
• Oracle

For more details, see this blog post here:

http://blog.jooq.org/2014/01/08/lesser-known-sql-features-default-values/

Answer 2

Simply use:

INSERT INTO "MIGRATION"."VERSION" DEFAULT VALUES

reference Here