Getting All Constraint Names in Oracle SQL In SQL, theConstraintsdefine the rules for data in a table, which are applied to table columns when the table is created, enforcing data integrity and consistency. For
case when (bitand(c.defer, 128) = 128 or o.status in (3, 5) or ro.status in (3, 5)) then 'INVALID' else null end, case when (bitand(c.defer, 128) = 128 or o.status in (3, 5)) then 'INVALID' else null end ), null), decode(bitand(c.defer, 256), 256, 'DEPEND ON...
Drop constraint in Oracle: We can drop the constraint in Oracle using the alter table command. we can drop primary, foreign key, check, not null and unique constraint with the same command Coalesce Function in Oracle: The Coalesce function in Oracle will return the first expression if it is ...
Oracle Database - Enterprise Edition - Version 19.3.0.0.0 and later: ORA-00955: Name is already used by an existing object even though object does not exist in all_c
该视图仅适用于 OceanBase 数据库 Oracle 模式。 字段说明 字段名称类型是否可以为 NULL描述 OWNER VARCHAR2(128) NO 约束的拥有者 CONSTRAINT_NAME VARCHAR2(128) NO 约束名字 CONSTRAINT_TYPE VARCHAR2(1) NO 索引类型,目前只支持 NORMAL 类型 TABLE_NAME VARCHAR2(128) NO 约束所在的表的名字 SEARCH_CONDITION...
该视图仅适用于 OceanBase 数据库 Oracle 模式。 字段说明 字段名称类型是否可以为 NULL描述 OWNER VARCHAR2(128) NO 约束的拥有者 CONSTRAINT_NAME VARCHAR2(128) NO 约束名字 CONSTRAINT_TYPE VARCHAR2(1) NO 索引类型,目前只支持 NORMAL 类型 TABLE_NAME VARCHAR2(128) NO 约束所在的表的名字 SEARCH_CONDITION...
WHERE TABLE_NAME = 'EMPLOYEES' AND CONSTRAINT_NAME IN ( SELECT CONSTRAINT_NAME FROM all_constraints WHERE TABLE_NAME = 'EMPLOYEES' AND CONSTRAINT_TYPE = 'U'); 该语句将返回所有属于EMPLOYEES表的唯一性约束列的名称。 总的来说,all_constraints表是Oracle数据库中一个非常重要的系统表,在日常的数据库...
VALIDATED- All data obeys the constraint, but the unique index on the constraint has been dropped. This setting is useful in data warehousing environments, but has some restrictions. Refer toOracle Database Data Warehousing Guidefor more information on this setting. ...
Oracle tenant views Dictionary views ALL_ALL_TABLES ALL_ARGUMENTS ALL_COL_COMMENTS ALL_COLL_TYPES ALL_COL_PRIVS ALL_CONSTRAINTS ALL_CONS_COLUMNS ALL_DEF_AUDIT_OPTS ALL_ERRORS ALL_INDEXES ALL_IND_COLUMNS ALL_IND_EXPRESSIONS ALL_IND_PARTITIONS ALL_IND_SUBPARTITIONS ALL_METHOD_PARAMS ALL_OBJECTS ...
See Also:theTO_DATEfunction inOracle Database SQL ReferenceandOracle Database Application Developer's Guide - Fundamentals RELY VARCHAR2(4) Whether an enabled constraint is enforced or unenforced. See Also:theconstraintsinOracle Database SQL Reference LAST_CHANGE DATE When the constraint was last en...