On a fact table we disable the constraints, then load the table, then enable the constraints with the NOVALIDATE option. Now it gets an ORA-00054 because "ENABLE NOVALIDATE constraint" needs a lock on the referenced tables (but these are currently locked by other load processes). Changes ...
nested_table_col_properties::=画像の説明object_properties::=画像の説明(constraint::=の「inline_constraint」、「inline_ref_constraint」、「out_of_line_constraint」および「out_of_line_ref_constraint」を参照)supplemental_logging_props::=画像の説明...
enable_disable_clause: { ENABLE | DISABLE } [ VALIDATE | NOVALIDATE ] { UNIQUE (column [, column ]...) | PRIMARY KEY | CONSTRAINT constraint_name } [ using_index_clause ] [ exceptions_clause ] [ CASCADE ] [ { KEEP | DROP } INDEX ] enable_disable_other_clause: { ENABLE | DISABLE...
`mysql> create table emp (p_id int(10) not null,name varchar(10),city varchar(10),constraint pk_id primary key(p_id,name)); 现在,我想删除名称.i,尝试使用以下查询 mysql> alter table emp drop primary key(name); 但是它不是working.should --从主键中删除单个值是可能的。 浏览3提问于2016...
constraintAction ::= { ADD outoflineConstraint | RENAME CONSTRAINT <constraint_name> TO <new_constraint_name> | { ALTER | MODIFY } { CONSTRAINT <constraint_name> | PRIMARY KEY | UNIQUE | FOREIGN KEY } ( <col_name> [ , ... ] ) [ [ NOT ] ENFORCED ] [ VALIDATE | NOVALIDATE ] [...
MODIFY PRIMARY KEYconstrnt_stateMODIFY UNIQUE (column[,…])constrnt_stateRENAME CONSTRAINTconstraintTOnew_nameconstrnt_state: [[NOT]DEFERRABLE] [INITIALLY {IMMEDIATE|DEFERRED}] [RELY | NORELY] [USING INDEXusing_index_clause] [ENABLE|DISABLE] [VALIDATE|NOVALIDATE] [EXCEPTIONS INTO [schema.]table]...
是指在MS SQL Server数据库中使用ALTER TABLE语句修改表的所有约束。 概念:约束是用于限制表中数据的完整性规则。它们可以定义在表级别或列级别,并确保数据的一致性和有效性。 分类: MS SQL Server中的约束可以分为以下几种类型: 主键约束(Primary Key Constraint):用于唯一标识表中的每一行数据。 外键约束(Foreign...
Chapter 8, "SQL Statements: ALTER TABLE to constraint_clause" - Organization SQL Statements: ALTER CLUSTER to ALTER SYSTEM SQL Statements: ALTER TABLE to constraint_clause [ Previous book | Next book ]Advanced Security Administrator's Guide
inlineUniquePK::=[CONSTRAINT<constraint_name>]{UNIQUE|PRIMARYKEY}[[NOT]ENFORCED][[NOT]DEFERRABLE][INITIALLY{DEFERRED|IMMEDIATE}][{ENABLE|DISABLE}][{VALIDATE|NOVALIDATE}][{RELY|NORELY}] inlineFK:=[CONSTRAINT<constraint_name>][FOREIGNKEY]REFERENCES<ref_table_name>[(<ref_col_name>)][MATCH{FULL|...
SQL> alter table test6u add constraint uni_test7 unique (object_id); Table altered. ---在表中dba_constraint查询约束内容 select constraint_name,table_name,constraint_type from dba_constraints where owner='AIKI2' and table_name in ('TEST6','TEST6U') ...