mysql - mysql替换字符串计数限制

Question

Mysql Replace 函数替换它在指定列或字符串中找到的字符串，是否有任何其他方法可以限制列/字符串的替换计数？

# replace 32 from the string, there are 3 occurance
SELECT REPLACE('32,138,149,145,146,121,134,127,129,120,132,232','32','');

# note: 132,232 converted to 1 and 2
print>>> ,138,149,145,146,121,134,127,129,120,1,2

如何克服这一点？

Answer 1

假想将干草堆与“，”连接起来，然后寻找针“，32”，并将其替换为“，”

SELECT REPLACE(CONCAT(',','32,138,149,145,146,121,134,127,129,120,132,232',','), ',32,', ',');

此外，如果您愿意，还可以修剪两端的逗号。

SELECT TRIM(BOTH ',' FROM REPLACE(CONCAT(',','32,138,149,145,146,121,134,127,129,120,132,232',','), ',32,', ','));