1、标注外键
SELECT S.*,
PK.*,
CASE
WHEN PK.COLUMN_POSITION > 0 THEN
‘√‘
ELSE
‘‘
END AS PKYN
FROM (SELECT A.OWNER,
A.TABLE_NAME,
A.COLUMN_NAME,
A.COLUMN_ID,
DECODE(A.CHAR_LENGTH,
0,
DECODE(A.DATA_SCALE,
NULL,
A.DATA_TYPE,
A.DATA_TYPE || ‘(‘ || A.DATA_PRECISION || ‘,‘ ||
A.DATA_SCALE || ‘)‘),
A.DATA_TYPE || ‘(‘ || A.CHAR_LENGTH || ‘)‘) AS COLTYPE,
A.DATA_DEFAULT AS DEFAULTVAL,
CASE
WHEN A.NULLABLE = ‘Y‘ THEN
‘√‘
ELSE
‘‘
END AS NULLYN,
B.COMMENTS AS COMMENTSS
FROM SYS.ALL_TAB_COLUMNS A, SYS.DBA_COL_COMMENTS B
WHERE A.OWNER = B.OWNER
AND A.TABLE_NAME = B.TABLE_NAME
AND A.COLUMN_NAME = B.COLUMN_NAME
AND A.OWNER = ‘ORDERS‘
AND A.TABLE_NAME = ‘T_ORDER‘) S,
(SELECT AA.INDEX_OWNER,
AA.TABLE_NAME,
AA.COLUMN_POSITION,
AA.COLUMN_NAME
FROM ALL_IND_COLUMNS AA, ALL_CONSTRAINTS BB
WHERE BB.CONSTRAINT_TYPE = ‘P‘
AND AA.TABLE_NAME = BB.TABLE_NAME
AND AA.INDEX_NAME = BB.CONSTRAINT_NAME
AND AA.INDEX_OWNER=BB.OWNER) PK
WHERE S.OWNER = PK.INDEX_OWNER( )
AND S.TABLE_NAME = PK.TABLE_NAME( )
AND S.COLUMN_NAME = PK.COLUMN_NAME( )
ORDER BY S.TABLE_NAME, S.COLUMN_ID;
2、简单
SELECT COL.TABLE_NAME,
TT.COMMENTS,
COL.COLUMN_NAME AS COLUMNNAME,
CASE
WHEN PKCOL.COLUMN_POSITION > 0 THEN
‘√‘
ELSE
‘‘
END AS ISPK,
COL.DATA_TYPE AS TYPENAME,
COL.DATA_LENGTH 占用字节数,
COL.DATA_PRECISION AS PRECI,
COL.DATA_SCALE AS SCALE,
CASE
WHEN COL.NULLABLE = ‘Y‘ THEN
‘√‘
ELSE
‘‘
END AS CISNULL,
COL.DATA_DEFAULT AS DEFAULTVAL,
CCOM.COMMENTS AS DETEXT
FROM USER_TAB_COLUMNS COL,
USER_COL_COMMENTS CCOM,
(SELECT AA.TABLE_NAME,
AA.INDEX_NAME,
AA.COLUMN_NAME,
AA.COLUMN_POSITION
FROM USER_IND_COLUMNS AA, USER_CONSTRAINTS BB
WHERE BB.CONSTRAINT_TYPE = ‘P‘
AND AA.TABLE_NAME = BB.TABLE_NAME
AND AA.INDEX_NAME = BB.CONSTRAINT_NAME) PKCOL,
USER_TAB_COMMENTS TT
WHERE COL.TABLE_NAME = CCOM.TABLE_NAME
AND COL.COLUMN_NAME = CCOM.COLUMN_NAME
AND COL.TABLE_NAME = TT.TABLE_NAME( )
AND COL.COLUMN_NAME = PKCOL.COLUMN_NAME( )
AND COL.TABLE_NAME = PKCOL.TABLE_NAME( )
ORDER BY COL.TABLE_NAME, COL.COLUMN_ID;