selectt.column_name,t.commentsfromuser_col_commentstwheret.table_name={0}orderbyt.column_nameasc user_tab_comments表,根据表名称查询表的备注信息。 selectt.commentsfromuser_tab_commentstwheret.table_name={0} user_constraints表,根据表名称查询表上的约束与索引名称,这里用到的约束类型有P(主键约束)...
1.comment on table 2.comment on column 【constraint】 1.约束的种类 2.约束的4种状态 3.添加约束,删除约束,修改约束的状态,查看约束
1.查询出所有表的唯一键约束的 禁用sql select 'alert table ' || table_name || ' disable constraint '||constraint_name||';' from user_constraints where constraint_type='U'; 如下: alert table SYENTINFO2 disable constraint UQ_SY20180806; alert table WEB_INFO disable constraint UQWEBINFO20180721...
Tests whether the given Column appears in any ColumnConstraint on its owning table of given constraint types. Parameters: col - the column to tests (must be parented by a table) constraintTypes - the types of ColumnConstraint to search for. Returns: true if the column appears in any of ...
1-1 2 Tables Overview This section provides information about tables within Oracle Fusion CX Analytics warehouse and their columns, primary keys denoted as key columns, data types, and the referred table and column names. Note: Tables ending with the suffix _EN and those listed in Tables ...
SQL>grantallondirectory ext_data_filestoscott2/授权成功。 这可以让SCOTT有能力建立外部表,并且在表定义中使用EXT_DATA_FILES目录对象。 3 BADFILE和NOBADFILE 当读取用户的外部表时,数据库可能会遇到数据类型转换错误,不能够将源文件转换成数据库中为外部表定义的列。如果用户在CREATE TABLE语句中使用如下语法,...
如果创建数据迁移项目前,无法确定有哪些新增表,则需要授予SELECT ANY TABLE权限。 正向切换 GRANTALTERSESSIONtooms_user;GRANTCREATESESSIONtooms_user;GRANTCONNECTtooms_user;GRANTSELECTonALL_CONSTRAINTStooms_user;GRANTSELECTonALL_CONS_COLUMNStooms_user;GRANTSELECTonALL_IND_EXPRESSIONStooms_user;GRANTSELECTonALL_LOB...
"No valid primary key found for source table [<TableOwner>].[<TableName>]" For information about requirements for primary keys, see the section "Unique Indexes and Constraints" in the topic Design Considerations and Limitations for Oracle Publishers. SQL Server Error 21642 Is Raised Regarding a...
Fast load using Direct Path: In this mode, the destination component uses the OCI direct path protocol for loading the Oracle table.When using fast load mode, the following are some restrictions:Triggers are not supported. Referential integrity constraints are not supported. Clustered tables are no...
可以通过查询数据字典视图 `USER_CONSTRAINTS` 或者 `ALL_CONSTRAINTS` 来获取外键约束的名称。 2. 删除外键约束:一旦确定了外键约束的名称,就可以使用 `ALTER TABLE` 语句来删除外键约束。具体的步骤如下: ```sql ALTER TABLE table_name DROP CONSTRAINT constraint_name; ``` 其中,`table_name` 是包含外键...