示例表：
id some_column
1 value1
2 value2
2 value3
3 value4
1 value5
预期结果：
id some_column
1 value1, value5
2 value2, value3
3 value4
我尝试了select id, concat(some_column) from table_name group by id
它表示concat不存在或许可被拒绝......