Bitmap Indexis an index type used in scenarios with repetitive values. For instance, a traditional B-Tree index would be too expensive for data warehouses, but Bitmap indexes will save space. In addition, Bitmap indexes work best with complicated queries containing WHERE clauses with multiple ...
若源库和目标库的数据目录、日志目录相同,需忽略该步骤。 --生成数据目录转换脚本 select 'alter database rename ' || a.FILE# || ' to "' || a.NAME || '";' from v$datafile a union all select 'alter database rename ' || a.FILE# || ' to "' || a.NAME || '";' from v$tempfi...
RENAME statement, 15-4 repeatable reads, 24-3 replication administration, 31-12 applications that use, 31-3 availability, 31-2 conflict resolution, 31-15 conflicts procedural replication, 31-17 definition, 31-2 deployment templates, 31-11 disconnected computing, 31-2 groups, 31...
65、AUDIT, COMMENT, DELETE, GRANT, INDEX, INSERT, LOCK, RENAME, SELECT, UPDATE, REFERENCES, and EXECUTE. Positions 14, 15, and 16 are reserved for future use. The characters are: - for none, S for success, F for failure, and B for both).COMMENT_TEXTVARCHAR2(4000)Text comment on th...
RENAME TABLE、TRUNCATE TABLE、CREATE INDEX 说明 仅支持迁移当前数据库账号下的CREATE INDEX操作。 数据类型映射关系 详情请参见异构数据库间的数据类型映射关系。 准备工作 登录待迁移的Oracle数据库,创建用于采集数据的账号并授权。 说明 如您已创建包含下述权限的账号,可跳过本步骤。 数据库 结构...
This approach also works for attached tables. Specifically, if you have an MS Access application database calleda.mdbthat contains linked tables to another MS Access database calledb.mdb, you should follow the steps outlined below: Rename both databases to the name of the Oracle user to which...
While one partition is marked UNUSABLE, the other partitions of the index are still valid. You can execute statements that require the index if the statements do not access the unusable partition. You can also split or rename the unusable partition before rebuilding it. LightDB Enterprise Postgres...
SQL> ALTER INDEX create_date_ind2 RENAME TO create_date_ind; 索引已更改。 验证 sql> select partitioned from user_tables where table_name = 'UNPAR_TABLE'; par --- yes sql> select partition_name from user_tab_partitions where table_name = 'UNPAR_TABLE'; ...
sql> alter database rename file 'c:\oracle\oradata\app_data.dbf' sql> to 'c:\oracle\app_data.dbf'; 第三章:表 1.create a table sql> create table table_name (column datatype,column datatype]...) sql> tablespace tablespace_name [pctfree integer] [pctused integer] sql...
RENAME CONSTRAINT C_1_PAR TO C_1; ALTER INDEX S_NAME_IDX_PAR RENAME TO S_NAME_IDX; ALTER INDEX U_1_PAR RENAME TO U_1; --查看索引,约束名称是否正确 select table_name,index_name from user_indexes where table_name in ('STUDENT','STUDENT_PAR') order by table_name; TABLE_NAME INDEX...