diff --git a/documentation/tdenginedocs-cn/super-table/index.html b/documentation/tdenginedocs-cn/super-table/index.html index 2695f80aea2a325a78c1fa3a48c77ce11b0b5157..c4f1d5b9136aa2cae2000fe01fd25ace7bfee582 100644 --- a/documentation/tdenginedocs-cn/super-table/index.html +++ b/documentation/tdenginedocs-cn/super-table/index.html @@ -74,7 +74,7 @@ tags (location binary(20), type int)

修改超级表的标签名，从超级表修改某个标签名后，该超级表下的所有子表也会自动更新该标签名。

  • 修改子表的标签值

    -
    ALTER TABLE <table_name> SET <tag_name>=<new_tag_value>
+
    ALTER TABLE <table_name> SET TAG <tag_name>=<new_tag_value>
    • diff --git a/documentation/tdenginedocs-en/getting-started/index.html b/documentation/tdenginedocs-en/getting-started/index.html index c4dfcd74d28d5a04f3e7f7c3115d50e86003e2e2..039128e9647018b83c6e565bc8be8b2fa6908335 100644 --- a/documentation/tdenginedocs-en/getting-started/index.html +++ b/documentation/tdenginedocs-en/getting-started/index.html @@ -18,7 +18,7 @@ 
    systemctl start taosd

    Then check if the server is working now.

    systemctl status taosd
    -

    If the service is running successfully, you can play around though TDengine shell taos, the command line interface tool located in directory /usr/local/bin/taos

    +

    If the service is running successfully, you can play around through TDengine shell taos, the command line interface tool located in directory /usr/local/bin/taos

    Note: The systemctl command needs the root privilege. Use sudo if you are not the root user.

    TDengine Shell

    To launch TDengine shell, the command line interface, in a Linux terminal, type:

    diff --git a/documentation/tdenginedocs-en/super-table/index.html b/documentation/tdenginedocs-en/super-table/index.html index 9813e77c960e65ca9ecc8e265eaf3a76eaecebee..8eeefb62529bc6faa4b073569066be5effecdec2 100644 --- a/documentation/tdenginedocs-en/super-table/index.html +++ b/documentation/tdenginedocs-en/super-table/index.html @@ -67,40 +67,31 @@ INTERVAL(10M)

    Management of STables

    After you can create a STable, you can describe, delete, change STables. This section lists all the supported operations.

    Show STables in current DB

    -
    show stables;
-
    +
    show stables;

    It lists all STables in current DB, including the name, created time, number of fileds, number of tags, and number of tables which are created via this STable.

    Describe a STable

    -
    DESCRIBE <stable_name>
-
    +
    DESCRIBE <stable_name>

    It lists the STable's schema and tags

    Drop a STable

    -
    DROP TABLE <stable_name>
-
    +
    DROP TABLE <stable_name>

    To delete a STable, all the tables created via this STable shall be deleted first, otherwise, it will fail.

    List the Associated Tables of a STable

    -
    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] …)

    It will list all the tables which satisfy the tag filter conditions. The tables are all created from this specific STable. TBNAME is a new keyword introduced, it is the table name associated with the STable.

    -
    SELECT COUNT(TBNAME) FROM <stable_name> WHERE <tag_name> <[=|=<|>=|<>] values..> ([AND|OR] …)
-
    +
    SELECT COUNT(TBNAME) FROM <stable_name> WHERE <tag_name> <[=|=<|>=|<>] values..> ([AND|OR] …)

    The above SQL statement will list the number of tables in a STable, which satisfy the filter condition.

    Management of Tags

    You can add, delete and change the tags for a STable, and you can change the tag value of a table. The SQL commands are listed below.

    Add a Tag

    -
    ALTER TABLE <stable_name> ADD TAG <new_tag_name> <TYPE>
-
    +
    ALTER TABLE <stable_name> ADD TAG <new_tag_name> <TYPE>

    It adds a new tag to the STable with a data type. The maximum number of tags is 6.

    Drop a Tag

    -
    ALTER TABLE <stable_name> DROP TAG <tag_name>
-
    +
    ALTER TABLE <stable_name> DROP TAG <tag_name>

    It drops a tag from a STable. The first tag could not be deleted, and there must be at least one tag.

    Change a Tag's Name

    -
    ALTER TABLE <stable_name> CHANGE TAG <old_tag_name> <new_tag_name>
-
    +
    ALTER TABLE <stable_name> CHANGE TAG <old_tag_name> <new_tag_name>

    It changes the name of a tag from old to new.

    Change the Tag's Value

    -
    ALTER TABLE <table_name> SET <tag_name>=<new_tag_value>
-
    +
    ALTER TABLE <table_name> SET TAG <tag_name>=<new_tag_value>

    It changes a table's tag value to a new one.

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