SQL Server:比较两个表中的列 [英] SQL Server: compare columns in two tables
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问题描述
我最近完成了从某个应用程序的旧版本迁移到当前版本,并且在迁移数据库时遇到了一些问题。
I've recently done a migration from a really old version of some application to the current version and i faced some problems while migrating databases.
我需要一个查询这可以帮助我比较两个表中的列。我的意思是不是行中的数据,我需要比较列本身来找出,我错过了表结构的什么变化。
I need a query that could help me to compare columns in two tables. I mean not the data in rows, I need to compare the columns itself to figure out, what changes in table structure I've missed.
推荐答案
查看红门SQL比较
否则这里是一个开始(对于sql server)
Otherwise here is a start (for sql server)
select
so.name as [table],
sc.name as [column],
sc.type, sc.length, sc.prec, sc.scale, sc.collation
from
sysobjects so
inner join syscolumns sc ON so.id = sc.id
where so.type='u'
order by so.name, sc.colorder
您可以查看
- INFORMATION_SCHEMA.TABLES
- INFORMATION_SCHEMA.COLUMNS
- INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS
- INFORMATION_SCHEMA.TABLE_CONSTRAINTS
- INFORMATION_SCHEMA.KEY_COLUMN_USAGE
表格。
[update]
[update]
使用INFORMATION_SCHEMA表格
Using the INFORMATION_SCHEMA tables
SELECT
[table].TABLE_NAME AS [Table_Name],
[column].COLUMN_NAME AS [Column_Name],
COLUMNPROPERTY(object_id([table].[TABLE_NAME]), [column].[COLUMN_NAME], 'IsIdentity') AS [identity],
[column].DATA_TYPE AS [datatype],
[column].CHARACTER_MAXIMUM_LENGTH AS [Character_Length],
[column].NUMERIC_PRECISION AS Numeric_precision,
[column].ORDINAL_POSITION AS [order],
[column].COLUMN_DEFAULT AS [defaultvalue],
[column].IS_NULLABLE AS [nullable]
FROM
INFORMATION_SCHEMA.TABLES [table] INNER JOIN
INFORMATION_SCHEMA.COLUMNS [column] ON [table].TABLE_NAME = [column].TABLE_NAME
WHERE
[table].TABLE_TYPE = 'BASE TABLE'
AND [table].TABLE_NAME <> 'sysdiagrams'
ORDER BY
[table].TABLE_NAME ASC,
[column].ORDINAL_POSITION ASC
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