mysql ,其他库也有类似方法,百度
根据符号拆分列
SELECT
SUBSTRING_INDEX(SUBSTRING_INDEX('a-b-c', '-', 1), '-', -1) AS col1
SUBSTRING_INDEX(SUBSTRING_INDEX(column_name, ',', 1), ',', -1) AS col1,
SUBSTRING_INDEX(SUBSTRING_INDEX(column_name, ',', 2), ',', -1) AS col2,
SUBSTRING_INDEX(SUBSTRING_INDEX(column_name, ',', 3), ',', -1) AS col3