本文主要是介绍比较两个库中的表和字段试图，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
-- 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
这篇关于比较两个库中的表和字段试图的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！
