Question

鉴于以下内容 - 如何在SQL Server中用0替换尾随空格？

CREATE TABLE TestTable
(
    TestField CHAR(8)
)   

INSERT INTO TestTable
SELECT ' 1 1 1  '   
INSERT INTO TestTable
SELECT ' 1 1 1 1'   

SELECT  
TestField,   
LEN(TestField) AS LenTestField,
REPLACE(TestField, ' ', '0') AS TestFieldReplaced,
LEN(REPLACE(TestField, ' ', '0')) AS LenTestFieldReplaced,
REPLACE(TestField, ' ', '0') + REPLICATE('0', DATALENGTH(TestField)-LEN(TestField)), 
REPLACE(CONVERT(VARCHAR,TestField), ' ', '0')
FROM    TestTable

Answer 1

您可以利用LEN和DATALENGTH的差异。 LEN删除尾随空格，DATALENGTH不删除尾随空格。 REPLICATE将采用零长度参数

SELECT
   RTRIM(TestField) + REPLICATE('0', DATALENGTH(TestField)-LEN(TestField))
FROM
   TestTable

Answer 2

怎么样：

DECLARE @test TABLE
(num nvarchar(30) )

INSERT INTO @test (num) VALUES ('1 1 1   ')

SELECT LEFT(num, LEN(num)) + REPLICATE('0', LEN(REPLACE(num, ' ', '*')) - LEN(num)) FROM @test

如何在SQL Server中用0替换尾随空格？

2 个答案: