提交 e7f473fc 编写于 作者: M malong

什么是超级表 事例中的where条件字段写错了,name应该改为location

上级 7e52ceba
...@@ -218,7 +218,7 @@ GROUP BY location, type ...@@ -218,7 +218,7 @@ GROUP BY location, type
```mysql ```mysql
SELECT COUNT(*), AVG(degree), MAX(degree), MIN(degree) SELECT COUNT(*), AVG(degree), MAX(degree), MIN(degree)
FROM thermometer FROM thermometer
WHERE name<>'beijing' and ts>=now-1d WHERE location<>'beijing' and ts>=now-1d
INTERVAL(10M) INTERVAL(10M)
GROUP BY location, type GROUP BY location, type
``` ```
...@@ -102,7 +102,7 @@ List the number of records, average, maximum, and minimum temperature every 10 m ...@@ -102,7 +102,7 @@ List the number of records, average, maximum, and minimum temperature every 10 m
```mysql ```mysql
SELECT COUNT(*), AVG(degree), MAX(degree), MIN(degree) SELECT COUNT(*), AVG(degree), MAX(degree), MIN(degree)
FROM thermometer FROM thermometer
WHERE name='beijing' and type=10 and ts>=now-1d WHERE location='beijing' and type=10 and ts>=now-1d
INTERVAL(10M) INTERVAL(10M)
``` ```
......
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