首页 > 代码库 > SQL对字符串进行排序

SQL对字符串进行排序

假设字符串中只由‘A‘、‘B‘、‘C‘、‘D‘组成,且长度为7。并设函数REPLICATE(<字符串>,<n>)可以创建一个<字符串>的n个副本的字符串,另外还有REPLACE(<目标字符串>,<老字符串>,<新字符串>),实现如下:

 1 BEGIN 2 DECLARE inString CHAR(7); 3 SET inString = DCDBAAB; 4  5 REPLICATE(A, (DATA_LENGTH(inString)-DATA_LENGTH(REPLACE(inString,A,‘‘)))) 6 || 7 REPLICATE(B, (DATA_LENGTH(inString)-DATA_LENGTH(REPLACE(inString,B,‘‘)))) 8 || 9 REPLICATE(C, (DATA_LENGTH(inString)-DATA_LENGTH(REPLACE(inString,C,‘‘))))10 ||11 REPLICATE(D, (DATA_LENGTH(inString)-DATA_LENGTH(REPLACE(inString,D,‘‘))))12 13 END;

 

SQL对字符串进行排序