user load isdistributed across multiple database servers. Through the use of multitiermaterialized views, you can create materialized views based on othermaterialized views, which
user load isdistributed across multiple database servers. Through the use of multitiermaterialized views, you can create materialized views based on othermaterialized views, which
Creates a materialized view. Syntax CREATE MATERIALIZED VIEW name [build_clause][create_mv_refresh] AS subquery where build_clause is: BUILD {IMMEDIATE | DEFERRED} where create_mv_refresh is: REFRESH [COMPLETE] [ON DEMAND] Description CREATE MATERIALIZED VIEW defines a view of a query that ...
列式存储可以在以下ddl语句中使用INMEMORY 子句启用. CREATE TABLE ALTER TABLE CREATE TABLESPACE ALTER TABLESPACE CREATE MATERIALIZED VIEW ALTER MATERIALIZED VIEW 通常情况下,通过 v$im_segments视图查询那些已经启用了列存储的数据库对象: SELECT OWNER, SEGMENT_NAME, INMEMORY_PRIORITY, INMEMORY_COMPRESSION FROM ...
postgres=# create bitmap index bit_index on product(name); ERROR: syntax error at or near "bitmap"LINE 1: create bitmap index bit_index on product(name);二、约束数据库约束用来防止无效的数据进入到表中，以保护数据的实体完整性，最常见的数据库约束就是主键，大多数SQL规范中都会包含建表...
You can specify the FREELIST GROUPS parameter only in CREATE TABLE, CREATE CLUSTER, CREATE MATERIALIZED VIEW, CREATE MATERIALIZED VIEW LOG, and CREATE INDEX statements. 7. BUFFER_POOL The BUFFER_POOL clause lets you specify a default buffer pool or cache for a schema object. All blocks for th...
CREATE TRIGGER REP_BUSI_FOLLOW_UP_INFO BEFORE INSERT OR UPDATE ON XXXXX.BUSI_FOLLOW_UP_INFO FOR EACH ROW EXECUTE PROCEDURE XXXXX.TRIG_FCT_REP_BUSI_FOLLOW_UP_INFO(); error code: 42601 msg:syntax error at or near "IS"" function=doTask line=558 file="mtk/pkg/mtk/mtk_task.go" taskID=...
ERROR: syntax error at or near "bitmap" LINE 1: create bitmap index bit_index on product(name); 二、约束 数据库约束用来防止无效的数据进入到表中,以保护数据的实体完整性,最常见的数据库约束就是主键,大多数SQL规范中都会包含建表需要定义主键。在Oracle数据库中,数据库约束分为5类:非空约束、主键约...
23、urns a syntax error7) you would like to display the system date in the format“ 14:44:17”。Which select statement should you use?_D_。A. select to_date(sydate,yearmmdd hh:mm:ss)from dual;B. select to_char(sydate,yearmonthday hh:mi:ss)from dual;C. select to_date(sydate,...
create table t (x not null primary key, y not null) as select rownum x, mod(rownum, 10) y from dual connect by level <= 1000; create materialized view log on t with rowid (x, y) including new values; create materialized view mv refresh fast on demand enable on query computation en...