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update english single quote and =< to <= 

update english single quote and less than or equal to <=
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xieyinglin 2019-10-15 16:10:39 +08:00 committed by GitHub
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1 changed files with 4 additions and 4 deletions
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8
documentation/webdocs/markdowndocs/Super Table-ch.md
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@ -30,7 +30,7 @@ CREATE TABLE <tb_name> USING <stb_name> TAGS (tag_value1,...)
沿用上面温度计的例子，使用超级表thermometer建立单个温度计数据表的语句如下：
```mysql
create table t1 using thermometer tags (‘beijing', 10)
create table t1 using thermometer tags ('beijing', 10)
```
上述SQL以thermometer为模板，创建了名为t1的表，这张表的Schema就是thermometer的Schema，但标签location值为'beijing'，标签type值为10。
@ -77,13 +77,13 @@ STable从属于库，一个STable只属于一个库，但一个库可以有一
- 查看属于某STable并满足查询条件的表
```mysql
SELECT TBNAME,[TAG_NAME,…] FROM <stable_name> WHERE <tag_name> <[=|=<|>=|<>] values..> ([AND|OR] …)
SELECT TBNAME,[TAG_NAME,…] FROM <stable_name> WHERE <tag_name> <[=|<=|>=|<>] values..> ([AND|OR] …)
```
查看属于某STable并满足查询条件的表。说明：TBNAME为关键词，显示通过STable建立的子表表名，查询过程中可以使用针对标签的条件。
```mysql
SELECT COUNT(TBNAME) FROM <stable_name> WHERE <tag_name> <[=|=<|>=|<>] values..> ([AND|OR] …)
SELECT COUNT(TBNAME) FROM <stable_name> WHERE <tag_name> <[=|<=|>=|<>] values..> ([AND|OR] …)
```
统计属于某个STable并满足查询条件的子表的数量
@ -221,4 +221,4 @@ FROM thermometer
WHERE name<>'beijing' and ts>=now-1d
INTERVAL(10M)
GROUP BY location, type
```
```