oracle中对insert into on duplicate key 语句的替代 insert into on duplicate key 是mysql中的语句,oracle中没有直接对应。不过采用merge into语句可以起到相同效果。 比如有一个表TTT,我们在no,start_time,code三个字段上建立了唯一索引;希望插入新记录时,如果在唯一索引上有重复的就更新,没有就直接插入。 MERGE...
Each request for data in a clustered table involves at least two I/O operations, one for the cluster index and one for the data. A hash cluster stores related data rows together, but groups the rows according to a hash value for the cluster key. The hash value is calculated with a ...
3. Select the database to delete and click Finish. Managing Templates with DBCA DBCA templates are XML files that contain information required to create a database. Templates are used in DBCA to create new databases and duplicate existing databases. The information in templates includes database ...
Here are some examples: DELETE 1=1 # Apply to all tables and delete all tuples DELETE TABLE_TEST[ID1='001'] # Apply only on table TABLE_TEST DELETE TABLE_TEST[ID1='001' OR ID1='002] DATE_CREATE > '2001-01-01' TABLE_INFO[NAME='test'] The last applies two different delete whe...
But if it's only usernames that clash, it's likely you want to know. And find out which rows you skipped. To do this you need to keep which rows failed. Store Duplicate Values with DML Error Logging DML error logging enablesinsert,update, anddeletestatements store exceptions in another ...
The Oracle Internet Directory Configuration Assistant (OIDCA) enables you to create, upgrade, and delete an Oracle Context, configure the fileldap.ora, and convert an Oracle Context to an Identity Management Realm. The OIDCA syntax is:
SQL Server Error 21642 Is Raised Regarding a Duplicate Linked Server Login When an Oracle Publisher is initially configured, a linked server entry is created for the connection between the Publisher and the Distributor. The linked server has the same name as the Oracle TNS service name. If you...
BulkInsertOrUpdate method can be used when there is need for both operations but in one connection to database. It makes Update when PK(PrimaryKey) is matched, otherwise does Insert.BulkInsertOrUpdateOrDelete effectively synchronizes table rows with input data. Those in Db that are not found...
By default, DRS retains a task in theConfigurationstate for three days. After three days, DRS automatically deletes background resources, but the task status remains unchanged. When you configure the task again, DRS applies for resources for the task again. In this case, the IP address of ...
ORA-10151: Force duplicate dependency removal ORA-10152: CBO don't consider function costs in plans ORA-10153: Switch to use public synonym if private one does not translate ORA-10154: Switch to disallow synonyms in DDL statements ORA-10155: CBO disable generation of transitive OR-chains ...