如何使用sqlite3数据库使用此格式构建查询?
CREATE TABLE sample (integer foo);
INSERT INTO sample VALUES (1);
...
INSERT INTO sample VALUES (10);
结果的格式
1,2,3
4,5,6
7,8,9
10
最佳答案 您必须添加一些标准来对它们进行分组:
CREATE TABLE sample (integer foo, char(1) bar);
INSERT INTO sample VALUES
(1, 'a'), (2, 'a'), (3, 'a'), (4, 'b'), (5, 'b'), (6, 'b'), (7, 'c') ...;
SELECT GROUP_CONCAT(foo ORDER BY foo, ',')
FROM sample
GROUP BY bar
编辑:
试试这个:
select group_concat(foo) from (
select s1.foo, (count(*) - 1) / 3 grp from sample s1
join sample s2 on s1.rowid >= s2.rowid
group by s1.rowid
) final
group by grp