用缩写列表 SQL 替换多个字符短语

Question

我在下面有一个 SQL 表（注意：用于使其更易于阅读的引号

Table1.Description  
"HOUSING,WRAP RECESSED"  
"HOUSING,ASSEMBLY 2-FEED"  
"LENS,FLUSH SUS"  

Table2.Abbreviations  
ASSY = ASSEMBLY  
FD = FEED  
FLUSH = FL  
HSG = HOUSING  
LENS = LNS    
RECESSED = REC

我想更新，或者类似于替换和创建一个新表（两者都可以），Table1.Description 和 Table2.Abbreviations。它应该是这样的：

Table1.Description  
"HSG,WRAP REC"  
"HSG,ASSY 2-FD"  
"LNS,FL SUS"  

Answer 1

这是另一个使用动态 SQL 和全局搜索和替换的选项。此过程本质上将“标记”字符串以避免冲突。

我应该注意，缩写最好在两个字段中（从、到）。提供的样本中的一对似乎不一致（Long > Short 和 Short to Long）。

Declare @Table1 table (ID int,Description varchar(500));Insert into @Table1 values (1,'HOUSING,WRAP RECESSED'),(2,'HOUSING,ASSEMBLY 2-FEED'),(3,'LENS,FLUSH SUS')
Declare @Table2 table (MapFrom varchar(50),MapTo varchar(50));Insert Into @Table2 values 
('ASSEMBLY','ASSY'),
('FEED'    ,'FD'),
('FLUSH'   ,'FL'),
('HOUSING' ,'HSG'),
('LENS'    ,'LNS'),
('RECESSED','REC')

Declare @SQL varchar(max)=''
Select  @SQL = @SQL+concat(',(',ID,',''||',replace(Description,'''',''''''),'||'')') From @Table1 --Where ID=2
Select  @SQL = Replace(@SQL,MapFrom,MapTo) 
 From   (
         Select MapFrom=' ',MapTo='|| ||'
         Union All
         Select ',','||,||'
         Union All
         Select '-','||-||'
         Union All
         Select MapFrom = '||'+ltrim(rtrim(MapFrom))+'||'
               ,MapTo   = ltrim(rtrim(MapTo))
          From  @Table2
          Union All
          Select '||',''   -- Remove Any Remaining |
         ) A
Select  @SQL = 'Select * From ('+Stuff(@SQL,1,1,'values')+') N(ID,Value)'
Exec(@SQL)

返回

ID  Value
1   HSG,WRAP REC
2   HSG,ASSY 2-FD
3   LNS,FL SUS

Answer 2

试试这样：

您的缩写表

CREATE TABLE Abbreviations (LongTerm VARCHAR(100),ShortTerm VARCHAR(10));
INSERT INTO Abbreviations VALUES
 ('ASSEMBLY','ASSY')
,('FEEd','FD')
,('FLUSH','FL')
,('HOUSING','HSG')
,('LENS','LNS')
,('RECESSED','REC');

GO

一个神奇的函数

CREATE FUNCTION dbo.ReplaceAbbreviations(@string VARCHAR(MAX))
RETURNS VARCHAR(MAX) AS
BEGIN
    SELECT @string=REPLACE(@string,LongTerm,ShortTerm)
    FROM Abbreviations;

    RETURN @string;
END
GO

带有您的字符串的表格

CREATE TABLE YourDescription (LongDescription VARCHAR(MAX));
INSERT INTO YourDescription VALUES
 ('HOUSING,WRAP RECESSED')
,('HOUSING,ASSEMBLY 2-FEED')  
,('LENS,FLUSH SUS');
GO

使用函数的简单选择

SELECT LongDescription
      ,dbo.ReplaceAbbreviations(LongDescription) AS ShortDescription
FROM YourDescription;
GO

清理测试场景

DROP TABLE YourDescription;
DROP FUNCTION dbo.ReplaceAbbreviations;
DROP TABLE Abbreviations;

结果

LongDescription            ShortDescription
HOUSING,WRAP RECESSED      HSG,WRAP REC
HOUSING,ASSEMBLY 2-FEED    HSG,ASSY 2-FD
LENS,FLUSH SUS             LNS,FL SUS

Answer 3

一般的策略是遍历每个单词/缩写对，并根据每一对更新 Table1.Description。我使用临时表创建了一个解决方案来说明如何做到这一点：

CREATE TABLE #table1 (descr VARCHAR(1000))
CREATE TABLE #abbr (word VARCHAR(1000), abr VARCHAR(1000), processed int)

DECLARE @word VARCHAR(1000)
DECLARE @abbr VARCHAR(1000)

INSERT INTO #table1
        ( descr )
VALUES  ( 'HOUSING,WRAP RECESSED'  -- descr - varchar(1000)

          ),
          ( 'HOUSING,ASSEMBLY 2-FEED'  -- descr - varchar(1000)

          ),
          ( 'LENS,FLUSH SUS'  -- descr - varchar(1000)

          )

INSERT INTO #abbr
        ( word, abr, processed )
VALUES  ( 'ASSEMBLY', -- word - varchar(1000)
          'ASSY'  -- abr - varchar(1000)
          ,0
          ),
          ( 'FEED', -- word - varchar(1000)
          'FD'  -- abr - varchar(1000)
          ,0
          ),
          ( 'FLUSH', -- word - varchar(1000)
          'FL'  -- abr - varchar(1000)
          ,0
          ),
          ( 'HOUSING', -- word - varchar(1000)
          'HSG'  -- abr - varchar(1000)
          ,0
          ),
          ( 'LENS', -- word - varchar(1000)
          'LNS'  -- abr - varchar(1000)
          ,0
          ),
          ( 'RECESSED', -- word - varchar(1000)
          'REC'  -- abr - varchar(1000)
          ,0
          )


WHILE EXISTS (SELECT * FROM #abbr WHERE processed = 0)
BEGIN
    SELECT TOP 1 @word = word, @abbr = abr FROM #abbr WHERE processed = 0

    UPDATE #table1
    SET descr = REPLACE(descr,@word,@abbr)

    UPDATE #abbr
    SET processed = 1
    WHERE word = @word AND abr = @abbr
END

SELECT * FROM #table1