SQL Server中的索引视图和Orcle中的Materialized View是一个概念,想要理解索引视图,必须先理解聚集索引。聚集索引简单来说理解成主键,数据库中的数据按照主键的顺序物理存储在表中,就像新华字典,默认是按照ABCD...这样的方式进行内容设置。ABCD...就相当于主键,这样就避免了整表扫描从而提高了性能,因此一个表中只能有一个聚集
SQL Server中的索引视图和Orcle中的Materialized View是一个概念,想要理解索引视图,必须先理解聚集索引。聚集索引简单来说理解成主键,数据库中的数据按照主键的顺序物理存储在表中,就像新华字典,默认是按照ABCD...这样的方式进行内容设置。ABCD...就相当于主键,这样就避免了整表扫描从而提高了性能,因此一个表中只能有...
In addition, Materialized View are supported. No, only the file statistics are cached. Result set caching Yes No, the query results are not cached. Only the file statistics are cached. Materialized views Yes No, the Materialized views are not supported in the serverless SQL pools. Table ...
專用SQL 集區中支援的 T-SQL 陳述式的文件連結。 資料定義語言 (DDL) 陳述式 ALTER DATABASE ALTER INDEX ALTER MATERIALIZED VIEW (預覽) ALTER PROCEDURE ALTER SCHEMA ALTER TABLE CREATE COLUMNSTORE INDEX CREATE DATABASE CREATE DATABASE SCOPED CREDENTIAL CREATE EXTERNAL DATA SOURCE CREA...
【问题描述】当对表A创建物化视图日志后,对A表执行update时,提示1146 - Table doesn’t exist,但desc table和select table都正常。 【复现路径】 # 创建日志 create MATERIALIZED VIEW LOG on table_a with sequence(90多个字段)including new values; # 执行更新 UPDATE table_a SET column_x = "11111111" WH...
SQL> exec dbms_mview.refresh('MV_T_ROWID'); begin dbms_mview.refresh('MV_T_ROWID'); end; ORA-12034: materialized view log on "SCOTT"."T_ROWID" younger than last refresh ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2563 ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2776 ...
SQL> exec dbms_mview.refresh('MV_T_ROWID'); begin dbms_mview.refresh('MV_T_ROWID'); end; ORA-12034: materialized view log on "SCOTT"."T_ROWID" younger than last refresh ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2563 ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2776 ...
FeatureSQL Server Aurora PostgreSQL DML Triggers Scope Statement level only FOR EACH ROW and FOR EACH STATMENT Access to change set INSERTED and DELETED virtual multi-row tables OLD and NEW virtual one-row tables or the whole view of changed rows System event t...
REFERENCINGis a new option since PostgreSQL 10. You can use it withAFTERtrigger to interact with the overall view of theOLDor theNEW TABLEchanged rows. Examples Create a trigger function that stores the run logic (this is the same as a SQL Server DML trigger). ...
Added support for MATERIALIZED VIEWs Added refresh! to refresh a materialized view Fixed update! with empty where clause Fixed SQL generation of an empty combined op on column level 0.7.0-alpha17 (2018-02-22) Added SQL exceptions provide generated SQL and parameters Fix storing nil value when ...