createorreplaceproceduresearch_string(pStringinvarchar)ascursorall_tab_cursorisselecta.owner, a.table_name, b.column_namefromdba_tables a, dba_tab_columns b, dba_objects cwherea.owner=b.owneranda.table_name=b.t
SQL>select constraint_name, constraint_type,search_condition, r_constraint_name from user_constraints where table_name = upper('&table_name'); SQL>select c.constraint_name,c.constraint_type,cc.column_name from user_constraints c,user_cons_columns cc where c.owner = upper('&table_owner') an...
数据迁移后比对数据对象信息时,select * from all_tables 语句查出来的表数量与实际的表数量不一致,多出来的为 BM$ 和CTI$ 开头的表是什么表?【问题分析】在达梦中 BM$ 开头的表名为创建位图索引的辅助表。命名方式:BM$_+ 位图索引对象 id。同时创建位图索引时也会创建一个触发器:BM$TRG+ 位图索引对象 id...
index_type from user_indexs where table_name='表名'; (2)显示索引列: 通过查询数据字段视图user_ind_columns,可以显示索引对应的列的信息 select table_name,column_name from user_ind_columns where index_name ='IND_ENAME'
and t.table_name = :table_name; -- 表名 字段 查看指定表中的字段 系统视图 dba_tab_columns、all_tab_columns 以及 user_tab_columns 包含了表、视图以及聚簇表中的字段信息。我们可以使用以下语句查看指定表中的字段: select owner, table_name, column_name, column_id, data_type, ...
因为这样的语句每个术语可能有超过一个计数。您可以在子查询上执行UNION ALL，然后执行带有Count的GroupBy...
selecttab.ownerasschema_name, tab.table_name, con.constraint_name, cols.column_name, search_conditionasconstraint, con.statusfromsys.all_tables tabjoinsys.all_constraints conontab.owner = con.ownerandtab.table_name = con.table_namejoinsys.all_cons_columns colsoncols.owner = con.ownerandcols....
查看某表的约束条件SQL>select constraint_name, constraint_type,search_condition, r_constraint_namefrom user_constraints where table_name = upper('&table_name');SQL>select c.constraint_name,c.constraint_type,cc.column_namefrom user_constraints c,user_cons_columns ccwhere c.owner = upper('&table...
If you want to also export this schema and create all objects under this namespace, set the EXPORT_SCHEMA directive to 1. This will set the schema search_path at top of export SQL file to the schema name set in the SCHEMA directive with the default pg_catalog schema. If you want to ...
In a relational database, all data is stored in two-dimensional tables that are composed of rows and columns. Oracle Database enables you to store data, update it, and efficiently retrieve it, with a high degree of performance, reliability, and scalability. Oracle Database is composed of ...