Get all table columns get /database/objects/columns/Returns all records from DBA_TAB_COLUMNS or ALL_TAB_COLUMNS view depending on role at runtime. Records included in the response describes the columns of all tables, views, and clusters that the role has access to. A client requires ...
QueryInfo colTypeInfo = new QueryInfo(); colTypeInfo.CustomSQL = string.Format(@"select a.column_name column_name,a.DATA_TYPE DATA_TYPE,b.comments comments from User_Tab_Columns a inner join user_col_comments b on a.table_name=b.table_name and lower(a.column_name) not in( 'sequence'...
查看表:user_tables、all_tables、dba_tables 查看表字段:user_tab_columns、all_ tab_columns、dba_tab_columns 查看表注释:user_ tab_comments 、all_tab_comments、dba_tab_comments 查看字段注释:user_col_comments、all_col_comments、dba_col_comments 查看索引信息:user_indexes、all_indexes、dba_indexes 查...
(RN); #查询没有索引的表 Select table_name from user_tables where table_name not in (select table_name from user_indexes) Select table_name from user_tables where table_name not in (select table_name from user_ind_columns) #AWR设置每隔30分钟收集一次报告,保留14天的报告 exec DBMS_WORKLOAD...
5.1 dba_/all_/user_part_tables 5.2 dba_/all_/user_tab_partitions 5.3 dba_/all_/user_part_key_columns 5.4 dba_/all_/user_part_col_statistics 六、总结导图 一、分区表概述 1.1 分区表概念 分区表就是将表在物理存储层面分成多个小的片段,这些片段即称为分区,每个分区保存表的一部分数据,表的分区...
user_tables where table_name = 'TABLE_NAME'; -- 12、检查在当前表中是否存在指定的列 select column_name as found from user_tab_cols where table_name = 'TABLE_NAME' and column_name = 'COLUMN_NAME'; -- 13、显示表结构 -- 方法一: 括号内容大写 select dbms_metadata.get_ddl('TABLE','...
表统计; --行数,块数,行平均长度;all_tables:NUM_ROWS,BLOCKS,AVG_ROW_LEN; 列统计; --列中唯一值的数量(NDV),NULL值的数量,数据分布; --DBA_TAB_COLUMNS:NUM_DISTINCT,NUM_NULLS,HISTOGRAM; 索引统计;--叶块数量,等级,聚簇因子; --DBA_INDEXES:LEAF_BLOCKS,CLUSTERING_FACTOR,BLEVEL; ...
The CREATE TABLE statement in Oracle databases is used to create new tables. GaussDB(DWS) also supports this statement. So it does not need to be migrated.The ALTER TABLE
from dba_tables t join dba_objects o on (o.owner = t.owner and o.object_name = t.table_name) where t.owner = :user_name -- 用户名 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...
[DBA,ALL,USER]_TAB_PARTITIONS [DBA,ALL,USER]_TAB_SUBPARTITIONS [DBA,ALL,USER]_PART_KEY_COLUMNS [DBA,ALL,USER]_SUBPART_KEY_COLUMNS [DBA,ALL,USER]_TAB_STATISTICS [DBA,ALL,USER]_TABLES [DBA,ALL,USER]_TABLESPACES [DBA,ALL,USER]_TRIGGER_COLS ...