odbtools/odbctest/mql/aaa/13aggregate/13having.mql

-- ============================================================
-- Having 子句测试
-- ============================================================

-- 1. group by + having count
select a_category, count(*) from /test/aaa/test_aggr group by a_category having count(*)>2
/**
output()
match("category_a")
**/
;

-- 2. group by + having sum
select a_category, sum(a_amount) from /test/aaa/test_aggr group by a_category having sum(a_amount)>500
/**
output()
match("category_c")
match("category_b")
**/
;

-- 3. group by + having avg
select a_category, avg(a_int) from /test/aaa/test_aggr group by a_category having avg(a_int)>=30
/**
output()
match("category_b")
match("category_c")
**/
;

-- 4. having 无匹配结果
select a_category, count(*) from /test/aaa/test_aggr group by a_category having count(*)>100
/**
output()
count(0)
**/
;