云数据库 GaussDB-TRUNCATE:示例

时间：2023-11-01 16:22:03

云数据库 GaussDB

示例

--创建表。openGauss=# CREATE TABLE tpcds.reason_t1 AS TABLE tpcds.reason;--清空表tpcds.reason_t1。openGauss=# TRUNCATE TABLE tpcds.reason_t1;--删除表。openGauss=# DROP TABLE tpcds.reason_t1;

--创建分区表。openGauss=# CREATE TABLE tpcds.reason_p(  r_reason_sk integer,  r_reason_id character(16),  r_reason_desc character(100))PARTITION BY RANGE (r_reason_sk)(  partition p_05_before values less than (05),  partition p_15 values less than (15),  partition p_25 values less than (25),  partition p_35 values less than (35),  partition p_45_after values less than (MAXVALUE));--插入数据。openGauss=# INSERT INTO tpcds.reason_p SELECT * FROM tpcds.reason;--清空分区p_05_before。openGauss=# ALTER TABLE tpcds.reason_p TRUNCATE PARTITION p_05_before;--清空分区p_15。openGauss=# ALTER TABLE tpcds.reason_p TRUNCATE PARTITION for (13);--清空分区表。openGauss=# TRUNCATE TABLE tpcds.reason_p;--删除表。openGauss=# DROP TABLE tpcds.reason_p;