Merge pull request #6658 from taosdata/docs/Update-Latest-Feature

Docs/update latest feature

documentation20/cn/11.administrator/docs.md

@@ -465,43 +465,44 @@ TDengine的所有可执行文件默认存放在 _/usr/local/taos/bin_ 目录下
 
 目前 TDengine 有将近 200 个内部保留关键字，这些关键字无论大小写均不可以用作库名、表名、STable 名、数据列名及标签列名等。这些关键字列表如下：
 
-| 关键字列表 |             |              |            |           |
-| ---------- | ----------- | ------------ | ---------- | --------- |
-| ABLOCKS    | CONNECTIONS | HAVING       | MODULES    | SMALLINT  |
-| ABORT      | COPY        | ID           | NCHAR      | SPREAD    |
-| ACCOUNT    | COUNT       | IF           | NE         | STABLE    |
-| ACCOUNTS   | CREATE      | IGNORE       | NONE       | STABLES   |
-| ADD        | CTIME       | IMMEDIATE    | NOT        | STAR      |
-| AFTER      | DATABASE    | IMPORT       | NOTNULL    | STATEMENT |
-| ALL        | DATABASES   | IN           | NOW        | STDDEV    |
-| ALTER      | DAYS        | INITIALLY    | OF         | STREAM    |
-| AND        | DEFERRED    | INSERT       | OFFSET     | STREAMS   |
-| AS         | DELIMITERS  | INSTEAD      | OR         | STRING    |
-| ASC        | DESC        | INTEGER      | ORDER      | SUM       |
-| ATTACH     | DESCRIBE    | INTERVAL     | PASS       | TABLE     |
-| AVG        | DETACH      | INTO         | PERCENTILE | TABLES    |
-| BEFORE     | DIFF        | IP           | PLUS       | TAG       |
-| BEGIN      | DISTINCT    | IS           | PRAGMA     | TAGS      |
-| BETWEEN    | DIVIDE      | ISNULL       | PREV       | TBLOCKS   |
-| BIGINT     | DNODE       | JOIN         | PRIVILEGE  | TBNAME    |
-| BINARY     | DNODES      | KEEP         | QUERIES    | TIMES     |
-| BITAND     | DOT         | KEY          | QUERY      | TIMESTAMP |
-| BITNOT     | DOUBLE      | KILL         | RAISE      | TINYINT   |
-| BITOR      | DROP        | LAST         | REM        | TOP       |
-| BOOL       | EACH        | LE           | REPLACE    | TOPIC     |
-| BOTTOM     | END         | LEASTSQUARES | REPLICA    | TRIGGER   |
-| BY         | EQ          | LIKE         | RESET      | UMINUS    |
-| CACHE      | EXISTS      | LIMIT        | RESTRICT   | UNION     |
-| CASCADE    | EXPLAIN     | LINEAR       | ROW        | UPLUS     |
-| CHANGE     | FAIL        | LOCAL        | ROWS       | USE       |
-| CLOG       | FILL        | LP           | RP         | USER      |
-| CLUSTER    | FIRST       | LSHIFT       | RSHIFT     | USERS     |
-| COLON      | FLOAT       | LT           | SCORES     | USING     |
-| COLUMN     | FOR         | MATCH        | SELECT     | VALUES    |
-| COMMA      | FROM        | MAX          | SEMI       | VARIABLE  |
-| COMP       | GE          | METRIC       | SET        | VGROUPS   |
-| CONCAT     | GLOB        | METRICS      | SHOW       | VIEW      |
-| CONFIGS    | GRANTS      | MIN          | SLASH      | WAVG      |
-| CONFLICT   | GROUP       | MINUS        | SLIDING    | WHERE     |
-| CONNECTION | GT          | MNODES       | SLIMIT     |           |
+|  关键字列表  |              |              |              |              |
+| ------------ | ------------ | ------------ | ------------ | ------------ |
+| ABORT        | CREATE       | IGNORE       | NULL         | STAR         |
+| ACCOUNT      | CTIME        | IMMEDIATE    | OF           | STATE        |
+| ACCOUNTS     | DATABASE     | IMPORT       | OFFSET       | STATEMENT    |
+| ADD          | DATABASES    | IN           | OR           | STATE_WINDOW |
+| AFTER        | DAYS         | INITIALLY    | ORDER        | STORAGE      |
+| ALL          | DBS          | INSERT       | PARTITIONS   | STREAM       |
+| ALTER        | DEFERRED     | INSTEAD      | PASS         | STREAMS      |
+| AND          | DELIMITERS   | INT          | PLUS         | STRING       |
+| AS           | DESC         | INTEGER      | PPS          | SYNCDB       |
+| ASC          | DESCRIBE     | INTERVAL     | PRECISION    | TABLE        |
+| ATTACH       | DETACH       | INTO         | PREV         | TABLES       |
+| BEFORE       | DISTINCT     | IS           | PRIVILEGE    | TAG          |
+| BEGIN        | DIVIDE       | ISNULL       | QTIME        | TAGS         |
+| BETWEEN      | DNODE        | JOIN         | QUERIES      | TBNAME       |
+| BIGINT       | DNODES       | KEEP         | QUERY        | TIMES        |
+| BINARY       | DOT          | KEY          | QUORUM       | TIMESTAMP    |
+| BITAND       | DOUBLE       | KILL         | RAISE        | TINYINT      |
+| BITNOT       | DROP         | LE           | REM          | TOPIC        |
+| BITOR        | EACH         | LIKE         | REPLACE      | TOPICS       |
+| BLOCKS       | END          | LIMIT        | REPLICA      | TRIGGER      |
+| BOOL         | EQ           | LINEAR       | RESET        | TSERIES      |
+| BY           | EXISTS       | LOCAL        | RESTRICT     | UMINUS       |
+| CACHE        | EXPLAIN      | LP           | ROW          | UNION        |
+| CACHELAST    | FAIL         | LSHIFT       | RP           | UNSIGNED     |
+| CASCADE      | FILE         | LT           | RSHIFT       | UPDATE       |
+| CHANGE       | FILL         | MATCH        | SCORES       | UPLUS        |
+| CLUSTER      | FLOAT        | MAXROWS      | SELECT       | USE          |
+| COLON        | FOR          | MINROWS      | SEMI         | USER         |
+| COLUMN       | FROM         | MINUS        | SESSION      | USERS        |
+| COMMA        | FSYNC        | MNODES       | SET          | USING        |
+| COMP         | GE           | MODIFY       | SHOW         | VALUES       |
+| COMPACT      | GLOB         | MODULES      | SLASH        | VARIABLE     |
+| CONCAT       | GRANTS       | NCHAR        | SLIDING      | VARIABLES    |
+| CONFLICT     | GROUP        | NE           | SLIMIT       | VGROUPS      |
+| CONNECTION   | GT           | NONE         | SMALLINT     | VIEW         |
+| CONNECTIONS  | HAVING       | NOT          | SOFFSET      | VNODES       |
+| CONNS        | ID           | NOTNULL      | STABLE       | WAL          |
+| COPY         | IF           | NOW          | STABLES      | WHERE        |
 

documentation20/cn/12.taos-sql/docs.md

@@ -89,13 +89,13 @@ TDengine 缺省的时间戳是毫秒精度，但通过在 CREATE DATABASE 时传
     ```mysql
     USE db_name;
     ```
-    使用/切换数据库
+    使用/切换数据库（在 RESTful 连接方式下无效）。
 
 - **删除数据库**
     ```mysql
     DROP DATABASE [IF EXISTS] db_name;
     ```
-    删除数据库。所包含的全部数据表将被删除，谨慎使用
+    删除数据库。指定 Database 所包含的全部数据表将被删除，谨慎使用！
 
 - **修改数据库参数**
     ```mysql
@@ -703,22 +703,24 @@ Query OK, 1 row(s) in set (0.001091s)
 
 ### 支持的条件过滤操作
 
-| **Operation**   | **Note**                      | **Applicable Data Types**             |
-| --------------- | ----------------------------- | ------------------------------------- |
-| >               | larger than                   | **`timestamp`** and all numeric types |
-| <               | smaller than                  | **`timestamp`** and all numeric types |
-| >=              | larger than or equal to       | **`timestamp`** and all numeric types |
-| <=              | smaller than or equal to      | **`timestamp`** and all numeric types |
-| =               | equal to                      | all types                             |
-| <>              | not equal to                  | all types                             |
-| between and     | within a certain range        | **`timestamp`** and all numeric types |
-| %               | match with any char sequences | **`binary`** **`nchar`**              |
-| _               | match with a single char      | **`binary`** **`nchar`**              |
+| **Operation**   | **Note**                      | **Applicable Data Types**                 |
+| --------------- | ----------------------------- | ----------------------------------------- |
+| >               | larger than                   | **`timestamp`** and all numeric types     |
+| <               | smaller than                  | **`timestamp`** and all numeric types     |
+| >=              | larger than or equal to       | **`timestamp`** and all numeric types     |
+| <=              | smaller than or equal to      | **`timestamp`** and all numeric types     |
+| =               | equal to                      | all types                                 |
+| <>              | not equal to                  | all types                                 |
+| between and     | within a certain range        | **`timestamp`** and all numeric types     |
+| in              | matches any value in a set    | all types except first column `timestamp` |
+| %               | match with any char sequences | **`binary`** **`nchar`**                  |
+| _               | match with a single char      | **`binary`** **`nchar`**                  |
 
 1. <> 算子也可以写为 != ，请注意，这个算子不能用于数据表第一列的 timestamp 字段。
 2. 同时进行多个字段的范围过滤，需要使用关键词 AND 来连接不同的查询条件，暂不支持 OR 连接的不同列之间的查询过滤条件。
-3. 针对单一字段的过滤，如果是时间过滤条件，则一条语句中只支持设定一个；但针对其他的（普通）列或标签列，则可以使用 `OR` 关键字进行组合条件的查询过滤。例如：((value > 20 AND value < 30) OR (value < 12)) 。
-4. 从 2.0.17 版本开始，条件过滤开始支持 BETWEEN AND 语法，例如 `WHERE col2 BETWEEN 1.5 AND 3.25` 表示查询条件为“1.5 ≤ col2 ≤ 3.25”。
+3. 针对单一字段的过滤，如果是时间过滤条件，则一条语句中只支持设定一个；但针对其他的（普通）列或标签列，则可以使用 `OR` 关键字进行组合条件的查询过滤。例如： `((value > 20 AND value < 30) OR (value < 12))`。
+4. 从 2.0.17.0 版本开始，条件过滤开始支持 BETWEEN AND 语法，例如 `WHERE col2 BETWEEN 1.5 AND 3.25` 表示查询条件为“1.5 ≤ col2 ≤ 3.25”。
+5. 从 2.1.4.0 版本开始，条件过滤开始支持 IN 算子，例如 `WHERE city IN ('Beijing', 'Shanghai')`。说明：BOOL 类型写作 `{true, false}` 或 `{0, 1}` 均可，但不能写作 0、1 之外的整数；FLOAT 和 DOUBLE 类型会受到浮点数精度影响，集合内的值在精度范围内认为和数据行的值完全相等才能匹配成功。<!-- REPLACE_OPEN_TO_ENTERPRISE__IN_OPERATOR_AND_UNSIGNED_INTEGER -->
 
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