MySQLのオプションでexplicit_defaults_for_timestampというオプションをご存知でしょうか？ これはTIMESTAMP型の特定の非標準動作を有効にするかどうか、およびTIMESTAMP型のカラムでNULL値の処理を有効にするかどうかを決定するオプションになります。

I'm relatively new to Oracle Databases, and I've been stuck on an issue for the past few hours. The Oracle timestamp data type is capable of storing fractional seconds (up to 9 digits, 6 is ...

This following query returns zero rows, yet I'm sure there is data there. SELECT class,time_stamp FROM cf_status_log WHERE class like 'any' AND ( time_stamp BETWEEN now() AND ( timestamp with time ...

Big JOIN: use SQL-like queries to join very large datasets at interactive speeds. Big Group Aggregations: perform groupings on large numbers of distinct values. Timestamp: native support for ...