Question

我有一个包含三列的表：A，B和C.

A ; B; C
"a1"; "b1"; "c1"
"a2"; "b2"; "c3"
"a3"; "b3"; "c3"

我需要从表格中的所有行中删除引号。 In this post我找到了一个有效但需要指定所有列名称的解决方案：

UPDATE myTable
SET A  = REPLACE(A, '"', '');

UPDATE myTable
SET B  = REPLACE(B, '"', '');

UPDATE myTable
SET C  = REPLACE(C, '"', '');

问题：是否有一种不那么冗长的方法将替换应用于所有列？例如一行表达式？

由于

Answer 1

我没有这方面的一行脚本，但是当我将数据存入sql server时，当我将数据中的所有双引号删除后，我的代码中有几行代码。这些列是varchar数据类型。

- 摆脱数据中的双引号

Declare @ColName SYSNAME , @Sql Nvarchar(Max)


Declare Cur Cursor FOR 
SELECT c.name 
from sys.columns c inner join sys.tables t on c.object_id = t.object_id
Where t.name = 'myTable'   --<-- Your Table name

 OPEN Cur 

  FETCH NEXT FROM Cur INTO @ColName

WHILE @@FETCH_STATUS = 0 
BEGIN


      SET @SQL = 'UPDATE myTable
                    SET ' + QUOTENAME(@ColName) + ' = LTRIM(RTRIM(ISNULL(REPLACE(' + QUOTENAME(@ColName) + ' , ''"'' , '''') , '''')))'

      --PRINT @SQL 
      Exec sp_executesql @Sql 

      FETCH NEXT FROM Cur INTO @ColName
END
CLOSE Cur 
DEALLOCATE Cur
GO

Answer 2

如果记录数量不大： -

您可以script out the schema and data。
将Find和Replace All替换为双引号。
运行已清理的脚本。

Answer 3

以下程序将用任何表中的另一个单个字符替换任何单个字符：）

USE [TSQL2012]--your database name
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

CREATE PROCEDURE dbo.replace_char 
@char_to_replace char(1), --character to be replaced
@expected_char char(1),
@table_name nvarchar(128) --your table name 
AS 
BEGIN

--Variable declaration
DECLARE @Column_Count_1 int 
DECLARE @SQLString AS NVARCHAR(4000)
DECLARE @count int=1
DECLARE @column_name nvarchar(128)

--Getting the count of column
SET @SQLString=N'select @Column_Count=count(*)  from  '+ @table_name
EXEC sp_executesql  @SQLString
, N'@Column_Count int OUTPUT'
, @Column_Count = @Column_Count_1 OUTPUT

--Getting the actual column names into a temporary table
select  c.name as name
into #temp_column_names
from sys.tables t
join sys.columns c
on t.object_id=c.object_id
where t.name=@table_name

--Looping through each column to replace the required character
WHILE (@count<=@Column_Count_1)
BEGIN
--setting the column name
SET @column_name=(select top 1 name from 
    (select Row_number()over (order by name) as r_n_n, name                  
    from #temp_column_names) aa 
    where r_n_n >=@count)

--updating the rows
SET @SQLString =N'Update '  + @table_name
SET @SQLString= @SQLString + N' Set ' + @column_name
SET @SQLString= @SQLString + N' = replace('  + @column_name
SET @SQLString =@SQLString + N',''' +@char_to_replace
SET @SQLString=@SQLString + N''',''' +@expected_char
SET @SQLString=@SQLString + N''');'

EXEC(@SQLString); 

SET @count=@count+1;
END

--Dropping the temp table
DROP TABLE #temp_column_names

END
GO

执行上述程序

EXEC dbo.replace_char @char_to_replace, @expected_char, @table_name

在你的情况下

EXEC dbo.replace_char '"', '','Sample_1'

Sample_1是我创建的表。

从SQL Server中的所有列中删除引号

3 个答案: