a.constraint_name, a.constraint_type, a.r_owner, a.r_constraint_name,--被外键引用的约束名 b.table_name --被外键引用的表名 from dba_constraints a, dba_constraints b where a.constraint_type = 'R' and a.r_constraint_name = b.constraint_name and a.r_owner = b.owner and b.table_n...
a.constraint_name, a.constraint_type, a.r_owner, a.r_constraint_name,--被外键引用的约束名 b.table_name --被外键引用的表名 from dba_constraints a, dba_constraints b where a.constraint_type = 'R' and a.r_constraint_name = b.constraint_name and a.r_owner = b.owner and b.table_n...
Oracle数据库rename(重建表)操作 Oracle 重建表(rename)注意事项总结 [日期：2014-07-02] 来源：Linux社区 作者：oradh [字体：大 中 小] 一、概述 前一段时间，有一个DBA朋友在完成重建表(rename)工作后，第二天早上业务无法正常运行，出现数据无法插入的限制和错误，后来分析才发现，错误的原因是使用...
SCHEMA can’t be renamed.DATABASEmodify db_name in init.ora and recreate controlfile INSTANCEshutdown;change ORACLE_SID;startup
Oracle 11.2.0.2新特性——用户重命名(Rename User) 11.2.0.2里新增了一个很有意思的新特性——用户重命名(Rename User),以前俺们都是Rename datafile呀,tablespace呀,Index呀,抑或是constraint之类,没想到User也可以重命名的。据说这个DDL操作的需求是来源于SAP: SAP identifies a specific SAP system by the name...
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There are conditions to check when you want to create an index on a table in Oracle: Do you query the particular column often? Is there a UNIQUE key integrity constraint existing on the column? Is there an integrity constraint existing on the column?
If the table consists of a view or foreign key that references the specified table and we need to rename that table at that time it shows the error message. On the other hand, if there is any constraint or triggers on that table and we attempt to rename that table then it will also...
In Oracle, the syntax is, ALTER TABLE "table_name" RENAME COLUMN "column 1" TO "column 2";Let's look at the example. Assuming our starting point is the Customer table created in the CREATE TABLE section: Table Customer Column Name Data Type First_Name char(50) Last_Name char(50...
Restriction: If a view, trigger, check constraint, foreign key constraint, or generationClause of a generated column references the column, an attempt to rename it will generate an error. Restriction: The RENAME COLUMN statement is not allowed if there are any open cursors that reference the col...