获取指定字符的个数=========>>
SELECT length('12312,2434,kjk33 ,jew,12342,')-length(replace('12312,2434,kjk33 ,jew,12342,',',','')) FROM dual;
获取指定字符的个数=========>>
SELECT length('12312,2434,kjk33 ,jew,12342,')-length(replace('12312,2434,kjk33 ,jew,12342,',',','')) FROM dual;