oracle 比较两个用户表结构的区别。

create table ESPACE_TABLE
(
  TABLE_NAME VARCHAR2(100) not null
)

create table ESPACE_COLUMN
(
  TABLE_NAME  VARCHAR2(100) not null,
  COLUMN_NAME VARCHAR2(100) not null
)

create table UC_TABLE_DIFFERENT
(
  S_TABLE_NAME     VARCHAR2(30),
  B_TABLE_NAME     VARCHAR2(30),
  S_COLUMN_NAME    VARCHAR2(30),
  B_COLUMN_NAME    VARCHAR2(30),
  S_DATA_TYPE      VARCHAR2(106),
  B_DATA_TYPE      VARCHAR2(106),
  S_DATA_LENGTH    NUMBER,
  B_DATA_LENGTH    NUMBER,
  S_DATA_PRECISION NUMBER,
  B_DATA_PRECISION NUMBER,
  S_DATA_SCALE     NUMBER,
  B_DATA_SCALE     NUMBER,
  S_NULLABLE       VARCHAR2(1),
  B_NULLABLE       VARCHAR2(1),
  S_DATA_DEFAULT   VARCHAR2(4000),
  B_DATA_DEFAULT   VARCHAR2(4000)
)

create table SDU_TABLES
(
  TABLE_NAME     VARCHAR2(30) not null,
  COLUMN_NAME    VARCHAR2(30) not null,
  DATA_TYPE      VARCHAR2(106),
  DATA_LENGTH    NUMBER not null,
  DATA_PRECISION NUMBER,
  DATA_SCALE     NUMBER,
  NULLABLE       VARCHAR2(1),
  DATA_DEFAULT   VARCHAR2(4000)
)

create table UC_TABLE_DIFFERENT
(
  S_TABLE_NAME     VARCHAR2(30),
  B_TABLE_NAME     VARCHAR2(30),
  S_COLUMN_NAME    VARCHAR2(30),
  B_COLUMN_NAME    VARCHAR2(30),
  S_DATA_TYPE      VARCHAR2(106),
  B_DATA_TYPE      VARCHAR2(106),
  S_DATA_LENGTH    NUMBER,
  B_DATA_LENGTH    NUMBER,
  S_DATA_PRECISION NUMBER,
  B_DATA_PRECISION NUMBER,
  S_DATA_SCALE     NUMBER,
  B_DATA_SCALE     NUMBER,
  S_NULLABLE       VARCHAR2(1),
  B_NULLABLE       VARCHAR2(1),
  S_DATA_DEFAULT   VARCHAR2(4000),
  B_DATA_DEFAULT   VARCHAR2(4000)
)

CREATE OR REPLACE PROCEDURE COMPARE_UC_TABLES
AS
BEGIN

    execute immediate 'delete from sdu_tables';
    execute immediate 'delete from bmp_tables';
    execute immediate 'delete from uc_table_different';

    execute immediate 'insert into sdu_tables select
          A.Table_Name,
          A.column_name ,A.data_type ,A.data_length ,A.data_precision ,
          A.Data_Scale ,A.nullable ,Default_value(a.OWNER,a.Table_Name,a.column_name) as Data_default
      from
          dba_tab_columns A
      where
          A.owner=''SDU'' and SUBSTR(TABLE_NAME,1,4) != ''BIN$''';
    execute immediate 'insert into bmp_tables select
          A.Table_Name,
          A.column_name ,A.data_type ,A.data_length ,A.data_precision ,
          A.Data_Scale ,A.nullable ,Default_value(a.OWNER,a.Table_Name,a.column_name) as Data_default
      from
          dba_tab_columns A
       where
          A.owner=''BMP'' and SUBSTR(TABLE_NAME,1,4) != ''BIN$''';

    DELETE FROM sdu_tables WHERE TABLE_NAME IN (SELECT TABLE_NAME FROM ESPACE_TABLE);
    DELETE FROM bmp_tables WHERE TABLE_NAME IN (SELECT TABLE_NAME FROM ESPACE_TABLE);
    DELETE FROM sdu_tables S WHERE EXISTS (SELECT 1 FROM ESPACE_COLUMN E WHERE E.TABLE_NAME = S.TABLE_NAME AND E.COLUMN_NAME = S.COLUMN_NAME);
    DELETE FROM bmp_tables B WHERE EXISTS (SELECT 1 FROM ESPACE_COLUMN E WHERE E.TABLE_NAME = B.TABLE_NAME AND E.COLUMN_NAME = B.COLUMN_NAME);
    commit;

execute immediate 'insert into uc_table_different select *
    from (select s.Table_Name     s_Table_Name,
                 b.Table_Name     b_Table_Name,
                 s.column_name    s_column_name,
                 b.column_name    b_column_name,
                 s.data_type      s_data_type,
                 b.data_type      b_data_type,
                 s.data_length    s_data_length,
                 b.data_length    b_data_length,
                 s.data_precision s_data_precision,
                 b.data_precision b_data_precision,
                 s.Data_Scale     s_Data_Scale,
                 b.Data_Scale     b_Data_Scale,
                 s.nullable       s_nullable,
                 b.nullable       b_nullable,
                 s.Data_default   s_Data_default,
                 b.Data_default   b_Data_default
            from sdu_tables s
            full join bmp_tables b on s.Table_Name = b.Table_Name
                                  and s.column_name = b.column_name)
   where s_column_name is null
      or b_column_name is null
      or s_data_type != b_data_type
      or s_data_length != b_data_length
      or s_data_precision != b_data_precision
      or s_Data_Scale != b_Data_Scale
      or s_nullable != b_nullable
      or s_Data_default != b_Data_default';

commit;

END COMPARE_UC_TABLES;
　　

begin
  compare_uc_tables;
end;
/
select * from uc_table_different ;