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update

2881099
2022-10-10 18:34:59 +08:00
parent c11b729122
commit 2abd215930
2 changed files with 27 additions and 6 deletions
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16
Group-Aggregation-Query.md

@@ -25,12 +25,22 @@ var list = fsql.Select<Topic>()
.Having(a => a.Count() < 300 || a.Avg(a.Key.mod4) < 100)
.OrderBy(a => a.Key.tt2)
.OrderByDescending(a => a.Count())
.ToList(a => new { a.Key, cou1 = a.Count(), arg1 = a.Avg(a.Value.Clicks) });
.ToList(a => new
{
a.Key,
cou1 = a.Count(),
arg1 = a.Avg(a.Value.Clicks),
arg2 = a.Sum(a.Value.Clicks > 100 ? 1 : 0)
});
//SELECT substr(a.`Title`, 1, 2) as1, count(1) as2, avg(a.`Id`) as3
//SELECT
//substr(a.`Title`, 1, 2) as1,
//count(1) as2,
//avg(a.`Clicks`) as3,
//sum(case when a.`Clicks` > 100 then 1 else 0 end) as4
//FROM `Topic` a
//GROUP BY substr(a.`Title`, 1, 2), (a.`Id` % 4)
//HAVING (count(1) > 0 AND avg((a.`Id` % 4)) > 0 AND max((a.`Id` % 4)) > 0) AND (count(1) < 300 OR avg((a.`Id` % 4)) < 100)
//HAVING (count(1) > 0 AND avg((a.`Id` % 4)) > 0 AND max((a.`Id` % 4)) > 0) AND (count(1) < 300 OR avg((a.`Id` % 4)) < 100)
//ORDER BY substr(a.`Title`, 1, 2), count(1) DESC
```

17
分组聚合查询.md

@@ -24,11 +24,22 @@ var list = fsql.Select<Topic>()
.Having(a => a.Count() < 300 || a.Avg(a.Key.mod4) < 100)
.OrderBy(a => a.Key.tt2)
.OrderByDescending(a => a.Count())
.ToList(a => new { a.Key, cou1 = a.Count(), arg1 = a.Avg(a.Value.Clicks) });
//SELECT substr(a.`Title`, 1, 2) as1, count(1) as2, avg(a.`Id`) as3
.ToList(a => new
{
a.Key,
cou1 = a.Count(),
arg1 = a.Avg(a.Value.Clicks),
arg2 = a.Sum(a.Value.Clicks > 100 ? 1 : 0)
});
//SELECT
//substr(a.`Title`, 1, 2) as1,
//count(1) as2,
//avg(a.`Clicks`) as3,
//sum(case when a.`Clicks` > 100 then 1 else 0 end) as4
//FROM `Topic` a
//GROUP BY substr(a.`Title`, 1, 2), (a.`Id` % 4)
//HAVING (count(1) > 0 AND avg((a.`Id` % 4)) > 0 AND max((a.`Id` % 4)) > 0) AND (count(1) < 300 OR avg((a.`Id` % 4)) < 100)
//HAVING (count(1) > 0 AND avg((a.`Id` % 4)) > 0 AND max((a.`Id` % 4)) > 0) AND (count(1) < 300 OR avg((a.`Id` % 4)) < 100)
//ORDER BY substr(a.`Title`, 1, 2), count(1) DESC
```