云数据库 GaussDB-使用:示例

时间：2025-01-26 10:39:12

云数据库 GaussDB

示例

-- 修改表的默认类型gaussdb=#  set enable_default_ustore_table=off;--准备数据。gaussdb=# CREATE TABLE t1(c1 int, c2 int);gaussdb=# INSERT INTO t1 VALUES(1, 1);gaussdb=# INSERT INTO t1 VALUES(2, 2);--创建增量物化视图。gaussdb=# CREATE INCREMENTAL MATERIALIZED VIEW mv AS SELECT * FROM t1;CREATE MATERIALIZED VIEW--插入数据。gaussdb=# INSERT INTO t1 VALUES(3, 3);INSERT 0 1--增量刷新物化视图。gaussdb=# REFRESH INCREMENTAL MATERIALIZED VIEW mv;REFRESH MATERIALIZED VIEW--查询物化视图结果。gaussdb=# SELECT * FROM mv; c1 | c2 ----+----  1 |  1  2 |  2  3 |  3(3 rows)--插入数据。gaussdb=# INSERT INTO t1 VALUES(4, 4);INSERT 0 1--全量刷新物化视图。gaussdb=# REFRESH MATERIALIZED VIEW mv;REFRESH MATERIALIZED VIEW--查询物化视图结果。gaussdb=# select * from mv; c1 | c2 ----+----  1 |  1  2 |  2  3 |  3  4 |  4(4 rows)--删除物化视图，删除表。gaussdb=# DROP MATERIALIZED VIEW mv;DROP MATERIALIZED VIEWgaussdb=# DROP TABLE t1; DROP TABLE