//效能
SET STATISTICS IO on;
SET STATISTICS TIME on;
//Mysql 切分字串
CREATE PROCEDURE proc_split(
inputstring VARCHAR(1000),
delim CHAR(1)
)
BEGIN
DECLARE strlen INT;
DECLARE last_index INT;
DECLARE cur_index INT;
DECLARE cur_char VARCHAR(200);
DECLARE len INT;
SET cur_index=1;
SET last_index=0;
SET strlen=LENGTH(inputstring);
DROP TABLE IF EXISTS splittable;
CREATE TEMPORARY TABLE splittable(
id INT AUTO_INCREMENT,
VALUE VARCHAR(20),
PRIMARY KEY (`ID`),
UNIQUE KEY `ID` (`ID`)
) ;
WHILE(cur_index<=strlen) DO
BEGIN
IF SUBSTRING(inputstring FROM cur_index FOR 1)=delim OR cur_index=strlen THEN
SET len=cur_index-last_index-1;
IF cur_index=strlen THEN
SET len=len+1;
END IF;
INSERT INTO splittable(`value`)VALUES(SUBSTRING(inputstring FROM (last_index+1) FOR len));
SET last_index=cur_index;
END IF;
SET cur_index=cur_index+1;
END;
END WHILE;
END;
CALL proc_split('1,2,3,4,3,4,3,4,4',',') ;
SELECT * from splittable;
//SQL SERVER 切分
CREATE FUNCTION fnSplitStr (
@sText NVARCHAR(Max),
@sDelim CHAR(1)
)
RETURNS @retArray TABLE (
value VARCHAR(100)
)
AS
BEGIN
DECLARE
@posStart BIGINT,
@posNext BIGINT,
@valLen BIGINT,
@sValue NVARCHAR(100);
IF @sDelim IS NULL
BEGIN
IF LEN(@sText)>100 SET @sText = SUBSTRING(@sText, 1, 100)
INSERT @retArray (value)
VALUES (@sText);
END
ELSE
BEGIN
SET @posStart = 1;
WHILE @posStart <= LEN(@sText)
BEGIN
SET @posNext = CHARINDEX(@sDelim, @sText, @posStart);
IF @posNext <= 0
SET @valLen = LEN(@sText) - @posStart + 1;
ELSE
SET @valLen = @posNext - @posStart;
SET @sValue = SUBSTRING(@sText, @posStart, @valLen);
SET @posStart = @posStart + @valLen + 1;
IF LEN(@sValue) > 0
BEGIN
IF LEN(@sValue)>100 SET @sValue = SUBSTRING(@sValue, 1, 100)
INSERT @retArray (value)
VALUES (@sValue);
END
END
END
RETURN
END
SELECT * FROM fnSplitStr('1,2,3,2,,3,3',',')