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  • Oracle获取表结构信息:表名、是否视图、字段名、类型、长度、非空、主键

    select
           a.TABLE_NAME as "TableName",
           case when (select count(*) from user_views v where v.VIEW_NAME =a.TABLE_NAME )>0 then 'V' else 'U'end as "TableType",
           a.COLUMN_NAME as "ColumnName",
           A.COLUMN_ID as "ColumnIndex",
           a.DATA_TYPE as "DataType",
           case  
             when a.DATA_TYPE = 'NUMBER' then
               case when a.Data_Precision is null then
                 a.Data_Length
                 else 
                   a.Data_Precision
                   end 
             else
              a.Data_Length
           end as "Length",
           case when a.nullable = 'N' then  '0' else '1' end as "IsNullable",
           b.comments as "Description", 
           case
              when (select count(*) from user_cons_columns c 
                where c.table_name=a.TABLE_NAME and c.column_name=a.COLUMN_NAME and c.constraint_name=
                    (select d.constraint_name from user_constraints d where d.table_name=c.table_name and d.constraint_type   ='P')
                     )>0 then '1' else '0'end as "IsPK"
                
      from USER_TAB_COLS a,
           sys.user_col_comments b
     where a.table_name = b.table_name      
           and b.COLUMN_NAME = a.COLUMN_NAME       
           order by a.TABLE_NAME, a.COLUMN_ID
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  • 原文地址:https://www.cnblogs.com/xiaotiannet/p/3838154.html
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