实现类似这样的sql语句拼接功能
squel.select()
.from("students")
.field("name")
.field("MIN(test_score)")
.field("MAX(test_score)")
.field("GROUP_CONCAT(DISTINCT test_score ORDER BY test_score DESC SEPARATOR ' ')")
.group("name")
/*
SELECT
name,
MIN(test_score),
MAX(test_score),
GROUP_CONCAT(DISTINCT test_score ORDER BY test_score DESC SEPARATOR ' ')
FROM
students
GROUP BY
name
*/