UTC TIMESTAMP special value

UTC TIMESTAMP indicates the Coordinated Universal (UTC) time when each row in the table was last modified.

When a column is declared with DEFAULT UTC TIMESTAMP, a default value is provided for inserts, and the value is updated with the current UTC date and time whenever the row is updated.

Columns declared with DEFAULT UTC TIMESTAMP contain unique values so that applications can detect near-simultaneous updates to the same row. If the current UTC timestamp value is the same as the last value, it is incremented by the value of the default_timestamp_increment option.

You can automatically truncate UTC timestamp values in SQL Anywhere with the default_timestamp_increment option. This is useful for maintaining compatibility with other database software that records less precise timestamp values.

Note

DEFAULT UTC TIMESTAMP is set at both INSERT and UPDATE and DEFAULT CURRENT UTC TIMESTAMP is set at INSERT.

Standards and compatibility

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