比较两个库中的表和字段试图

-- u表，p存储过程,v视图
-- webpark新库，oldpark旧库


SELECT NTABLE = A.NAME, OTABLE = B.NAME
FROM webpark..SYSOBJECTS A
  LEFT JOIN oldpark..SYSOBJECTS B
    ON A.NAME = B.NAME
WHERE ISNULL(B.NAME, '') = ''
  AND A.XTYPE = 'U'

UNION ALL

SELECT NTABLE = B.NAME, OTABLE = A.NAME
FROM oldpark..SYSOBJECTS A
  LEFT JOIN webpark..SYSOBJECTS B
    ON A.NAME = B.NAME
WHERE ISNULL(B.NAME, '') = ''
  AND A.XTYPE = 'U'
ORDER BY 1, 2


-- 比较两个数据库中每个表字段的差异

SELECT
  表名A = CASE WHEN ISNULL(A.TABLENAME, '') <> '' THEN A.TABLENAME ELSE B.TABLENAME END,
  字段名A = A.FIELDNAME,
  字段名B = B.FIELDNAME,
  顺序= A.FIELDSNO,
  说明= CASE WHEN A.FIELDTYPE <> B.FIELDTYPE THEN '类型: ' + A.FIELDTYPE + '-->' + B.FIELDTYPE
              WHEN A.FIELDSNO <> B.FIELDSNO THEN '顺序: ' + str(A.FIELDSNO) + '-->' + str(B.FIELDSNO)

WHEN A.LENGTH <> B.LENGTH THEN '长度: ' + str(A.LENGTH) + '-->' + str(B.LENGTH)
              WHEN A.LENSEC <> B.LENSEC THEN '小数位: ' + str(A.LENSEC) + '-->' + str(B.LENSEC)
              WHEN A.ALLOWNULL <> B.ALLOWNULL THEN '允许空值: ' + str(A.ALLOWNULL) + '-->' + str(B.ALLOWNULL)
         END

FROM (SELECT
        TABLENAME = B.NAME,
        FIELDNAME = A.NAME,
        FIELDSNO = A.COLID,
        FIELDTYPE = C.NAME,
        LENGTH = A.LENGTH,
        LENSEC = A.XSCALE,
        ALLOWNULL = A.ISNULLABLE
      FROM webpark..SYSCOLUMNS A

LEFT JOIN webpark..SYSOBJECTS B
          ON A.ID = B.ID
        LEFT JOIN webpark..SYSTYPES C
          ON A.XUSERTYPE = C.XUSERTYPE
      WHERE B.XTYPE = 'U') A
  FULL JOIN (SELECT

 TABLENAME = B.NAME,
               FIELDNAME = A.NAME,
               FIELDSNO = A.COLID,
               FIELDTYPE = C.NAME,
               LENGTH = A.LENGTH,
               LENSEC = A.XSCALE,
               ALLOWNULL = A.ISNULLABLE

 FROM oldpark..SYSCOLUMNS A
               LEFT JOIN oldpark..SYSOBJECTS B
                 ON A.ID = B.ID
               LEFT JOIN oldpark..SYSTYPES C
                 ON A.XUSERTYPE = C.XUSERTYPE
             WHERE B.XTYPE = 'U') B
    ON A.TABLENAME = B.TABLENAME
      AND A.FIELDNAME = B.FIELDNAME

WHERE ISNULL(A.TABLENAME, '') = ''
  OR ISNULL(B.TABLENAME, '') = ''
  OR A.FIELDTYPE <> B.FIELDTYPE
  OR A.FIELDSNO <> B.FIELDSNO
  OR A.LENGTH <> B.LENGTH
  OR A.LENSEC <> B.LENSEC
  OR A.ALLOWNULL <> B.ALLOWNULL
ORDER by 1, 4