SQL查询主键,其数据类型和列名?

时间:2011-03-18 19:58:17

标签: sql oracle oracle11g

正如标题所示,我很好奇是否有人知道如何查询表的主键,其数据类型和主键列的名称。今天早些时候,我单独询问了主键列并且效果很好。但是,我不知道如何提取其数据类型和列名。任何帮助将不胜感激。

谢谢!

2 个答案:

答案 0 :(得分:3)

这应该这样做:

SELECT ac.constraint_name, acc.column_name, acc.position
     , atc.data_type, atc.data_length
  FROM all_constraints ac JOIN all_cons_columns acc 
                               ON (ac.CONSTRAINT_NAME = acc.CONSTRAINT_NAME)
                          JOIN all_tab_cols atc ON (ac.owner = atc.owner AND 
                               ac.table_name = atc.TABLE_NAME AND 
                               acc.COLUMN_NAME = atc.COLUMN_NAME)
 WHERE ac.owner = 'table_owner'
   AND ac.table_name = 'your_table'
   AND ac.constraint_type = 'P'
 ORDER BY acc.position;

答案 1 :(得分:0)

使用查询表user_tab_columnsall_tab_columns

select column_name, data_type, data_length from user_tab_columns 
where table_name = 'MY_TABLE';

select * from all_tab_columns 
where owner = 'THE_SCHEMA_OWNER';