你知道在sql server中有一个快速的方法（通过transact-sql）我可以修剪所有的数据库字符串字段。
答案 0 :(得分：19)
没有游标。复制并粘贴输出。也适用于SQL 2000，它没有varchar（max）。如果需要，可以很容易地将其扩展为在每个UPDATE的末尾添加GO行。
SELECT SQL
FROM ( SELECT t.TABLE_CATALOG
, t.TABLE_SCHEMA
, t.TABLE_NAME
, 0 SORT
, 'UPDATE ' + QUOTENAME(t.TABLE_CATALOG) + '.' + QUOTENAME(t.TABLE_SCHEMA) + '.' + QUOTENAME(t.TABLE_NAME) SQL
FROM INFORMATION_SCHEMA.TABLES t
JOIN INFORMATION_SCHEMA.COLUMNS c
ON t.TABLE_CATALOG = c.TABLE_CATALOG
AND t.TABLE_SCHEMA = c.TABLE_SCHEMA
AND t.TABLE_NAME = c.TABLE_NAME
WHERE t.TABLE_TYPE = 'BASE TABLE'
AND c.DATA_TYPE IN ('char','nchar','varchar','nvarchar')
GROUP BY t.TABLE_CATALOG
, t.TABLE_SCHEMA
, t.TABLE_NAME
UNION ALL
SELECT x.TABLE_CATALOG
, x.TABLE_SCHEMA
, x.TABLE_NAME
, CASE WHEN x.COLUMN_NAME_MIN = y.COLUMN_NAME
THEN 1
ELSE 2
END SORT
, CASE WHEN x.COLUMN_NAME_MIN = y.COLUMN_NAME
THEN 'SET '
ELSE ' , '
END + y.SQL SQL
FROM ( SELECT t.TABLE_CATALOG
, t.TABLE_SCHEMA
, t.TABLE_NAME
, MIN(c.COLUMN_NAME) COLUMN_NAME_MIN
FROM INFORMATION_SCHEMA.TABLES t
JOIN INFORMATION_SCHEMA.COLUMNS c
ON t.TABLE_CATALOG = c.TABLE_CATALOG
AND t.TABLE_SCHEMA = c.TABLE_SCHEMA
AND t.TABLE_NAME = c.TABLE_NAME
WHERE t.TABLE_TYPE = 'BASE TABLE'
AND c.DATA_TYPE IN ('char','nchar','varchar','nvarchar')
GROUP BY t.TABLE_CATALOG
, t.TABLE_SCHEMA
, t.TABLE_NAME
) x
JOIN ( SELECT t.TABLE_CATALOG
, t.TABLE_SCHEMA
, t.TABLE_NAME
, c.COLUMN_NAME
, QUOTENAME(c.COLUMN_NAME) + ' = LTRIM(RTRIM(' + QUOTENAME(c.COLUMN_NAME) + '))' SQL
FROM INFORMATION_SCHEMA.TABLES t
JOIN INFORMATION_SCHEMA.COLUMNS c
ON t.TABLE_CATALOG = c.TABLE_CATALOG
AND t.TABLE_SCHEMA = c.TABLE_SCHEMA
AND t.TABLE_NAME = c.TABLE_NAME
WHERE t.TABLE_TYPE = 'BASE TABLE'
AND c.DATA_TYPE IN ('char','nchar','varchar','nvarchar')
) y
ON x.TABLE_CATALOG = y.TABLE_CATALOG
AND x.TABLE_SCHEMA = y.TABLE_SCHEMA
AND x.TABLE_NAME = y.TABLE_NAME
) x
ORDER BY x.TABLE_CATALOG
, x.TABLE_SCHEMA
, x.TABLE_NAME
, x.SORT
, x.SQL
答案 1 :(得分：13)
你的问题有点模糊，但这就是你追求的目标吗？
UPDATE mytable SET mycolumn= LTRIM(RTRIM(mycolumn))
这将删除'mytable'表中'mycolumn'列中所有值的前导和尾随空格。
答案 2 :(得分：3)
通过动态创建更新语句来遍历information_schema.columns和RTRIM varchar / nvarchar列
答案 3 :(得分：3)
如果有人知道如何在没有光标的情况下执行此操作，请发布：
DECLARE @CRLF AS varchar(2)
SET @CRLF = CHAR(13) + CHAR(10)
DECLARE @TAB AS varchar(1)
SET @TAB = CHAR(9)
DECLARE @template AS varchar(max)
SET @template = 'UPDATE {@OBJECT_NAME}' + @CRLF + 'SET {@column_list}'
DECLARE c CURSOR FAST_FORWARD
FOR SELECT DISTINCT
QUOTENAME(T.TABLE_CATALOG) + '.' + QUOTENAME(T.TABLE_SCHEMA)
+ '.' + QUOTENAME(T.TABLE_NAME) AS [OBJECT_NAME]
FROM INFORMATION_SCHEMA.TABLES AS T
INNER JOIN INFORMATION_SCHEMA.COLUMNS AS C
ON T.TABLE_CATALOG = C.TABLE_CATALOG
AND T.TABLE_SCHEMA = C.TABLE_SCHEMA
AND T.TABLE_NAME = C.TABLE_NAME
AND T.TABLE_TYPE = 'BASE TABLE'
AND C.DATA_TYPE IN ('varchar', 'nvarchar')
ORDER BY 1
DECLARE @OBJECT_NAME AS sysname
OPEN c
FETCH NEXT FROM c INTO @OBJECT_NAME
WHILE @@FETCH_STATUS = 0
BEGIN
DECLARE @column_list AS varchar(max)
SELECT @column_list = COALESCE(@column_list + @CRLF + @TAB + ',', '')
+ QUOTENAME(C.COLUMN_NAME) + ' = LTRIM(RTRIM('
+ QUOTENAME(C.COLUMN_NAME) + '))'
FROM INFORMATION_SCHEMA.COLUMNS AS C
WHERE C.DATA_TYPE IN ('varchar', 'nvarchar')
AND QUOTENAME(C.TABLE_CATALOG) + '.'
+ QUOTENAME(C.TABLE_SCHEMA) + '.' + QUOTENAME(C.TABLE_NAME) = @OBJECT_NAME
ORDER BY C.ORDINAL_POSITION
PRINT REPLACE(REPLACE(@template, '{@column_list}', @column_list),
'{@OBJECT_NAME}', @OBJECT_NAME)
FETCH NEXT FROM c INTO @OBJECT_NAME
END
CLOSE c
DEALLOCATE c
答案 4 :(得分：2)
确保在VARCHAR字符串字段而不是CHAR字段上进行修剪：）
那不会有太大的好处。
答案 5 :(得分：1)
更新了dan的答案以使用数据库中的所有表。只需运行代码段并将结果复制即可执行。
SELECT 'UPDATE [' + TABLE_SCHEMA + '].[' + TABLE_NAME + '] SET [' + Column_Name + '] = ' + 'LTRIM(RTRIM([' + Column_Name + ']))'
FROM INFORMATION_SCHEMA.Columns c
WHERE Data_Type LIKE '%CHAR%'
答案 6 :(得分：0)
谢谢你们，
Entaroadun代码对我来说效果很好，我只需要对我的需求进行一些小改动，而且每次迭代我都必须重置@colum_list。
...
PRINT REPLACE(REPLACE(@template, '{@column_list}', @column_list),
'{@OBJECT_NAME}', @OBJECT_NAME)
PRINT 'GO'
SELECT @column_list = null
FETCH NEXT FROM c INTO @OBJECT_NAME
...
答案 7 :(得分：0)
- V Quick and Dirty！
- 如果要生成在单个表上运行的代码，请使用文本输出运行此代码;
在
上设置nocount声明@table nvarchar（100） 选择@table ='YourTableHere'
SELECT'UPDATE'+ @table +'SET' SELECT'['+ Column_Name +'] ='+'LTRIM（RTRIM（['+ Column_Name +']）），' FROM INFORMATION_SCHEMA.Columns WHERE Table_Name = @table AND Data_Type LIKE'％CHAR％'
- 作为文本输出运行（查询/结果到...结果到文本 - 将文本输出（不包括最后一个逗号）复制并粘贴到新的查询窗口中，然后运行它。
答案 8 :(得分：0)
好吧，这很快又很脏但是我已经充分激励了当前的项目'正确' - 而且没有游标，但是有点sql连接技巧。 是否使用动态SQL：
--exec spGenerateTrimStatements 'StaticImportMaturities'
ALTER PROCEDURE spGenerateTrimStatements
(
@TableName NVARCHAR(100)
)
AS
DECLARE @Cr char(2),
@OutputString nvarchar(max)
SELECT @Cr = CHAR(13) + CHAR(10)
SET NOCOUNT ON
-- Create table to store commands
CREATE TABLE #tOutput(OutputText nvarchar(500), RowID int identity(1,1))
-- Build up commands
INSERT #tOutput(OutputText)
SELECT 'UPDATE ' + @TableName + ' SET '
INSERT #tOutput(OutputText)
SELECT '[' + Column_Name + '] = ' + 'LTRIM(RTRIM([' + Column_Name + '])), '
FROM INFORMATION_SCHEMA.Columns
WHERE Table_Name = @TableName
AND Data_Type LIKE '%CHAR%'
-- Trim last comma
UPDATE #tOutput
SET OutputText = LEFT(OutputText, LEN(OutputText)-1)
WHERE RowID = (SELECT Max(RowID) FROM #tOutput)
-- use subselect to concatenate the command string
SELECT @OutputString = ISNULL(@OutputString, '') + ISNULL(OutputText, '')
FROM (SELECT OutputText
FROM #tOutput) TextOutput
-- run the command
EXEC sp_ExecuteSQL @OutputString