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jiafeng.zhang c02625efa9 [refactor][doc] Doris official website new version documentation (#8757 )

I started a discussion on this before, you can check it in the mail group

https://lists.apache.org/thread/o770bc3k623kyfks2mzkt21qsc4g6328

In order to facilitate everyone to organize the documents, I created a new-docs directory under the incubator-doris directory. The new directory structure is below this. I just created a directory structure here, which needs to be rearranged.

In the data import scenario, in order to take into account the viewing habits of previous users, the import is organized in two ways:

1. According to the usage scenario: This will give users clearer guidance. For example, the user is the data source of kafka, then the user can directly select the routine to load
2. According to the import method: it is the introduction of the various import methods we provided before

In order to facilitate everyone to run and debug locally, I migrated the entire .vuepress under the original document. After completion, you only need to delete the original docs directory and rename the new new-docs directory to docs. At the same time, you can also run it locally, so that you can organize documents and know the content of each document directory.

In the local debugging execution, switch to the new-docs directory and execute the following command:

````
npm install
npm run dev
````
then through the browser
http://ip:port/zh-CN
http://ip:port/en

2022-03-31 12:01:02 +08:00

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title, language

title	language
date_format	en

date_format

Description

Syntax

VARCHAR DATE' FORMAT (DATETIME DATE, VARCHAR Format)

Convert the date type to a bit string according to the format type. Currently supports a string with a maximum 128 bytes and returns NULL if the length of the return value exceeds 128

The date parameter is the valid date. Format specifies the date/time output format.

The formats available are:

% a | Abbreviation for Sunday Name

% B | Abbreviated Monthly Name

% C | Month, numerical value

% D | Sky in the Moon with English Prefix

% d | Monthly day, numerical value (00-31)

% e | Monthly day, numerical value (0-31)

% f | microseconds

% H | Hours (00-23)

% h | hour (01-12)

% I | Hours (01-12)

% I | min, numerical value (00-59)

% J | Days of Year (001-366)

% k | hours (0-23)

% L | Hours (1-12)

% M | Moon Name

% m | month, numerical value (00-12)

%p | AM or PM

% R | Time, 12 - hour (hh: mm: SS AM or PM)

% S | seconds (00-59)

% s | seconds (00-59)

% T | Time, 24 - hour (hh: mm: ss)

% U | Week (00-53) Sunday is the first day of the week

% U | Week (00 - 53) Monday is the first day of the week

% V | Week (01-53) Sunday is the first day of the week, and% X is used.

% v | Week (01 - 53) Monday is the first day of the week, and% x is used

% W | Sunday

% w | Weekly day (0 = Sunday, 6 = Saturday)

% X | Year, where Sunday is the first day of the week, 4 places, and% V use

% X | year, of which Monday is the first day of the week, 4 places, and% V

% Y | Year, 4

% Y | Year, 2

%% | Represent %

Also support 3 formats:

yyyyMMdd

yyyy-MM-dd

yyyy-MM-dd HH:mm:ss

example

mysql> select date_format('2009-10-04 22:23:00', '%W %M %Y');
+------------------------------------------------+
| date_format('2009-10-04 22:23:00', '%W %M %Y') |
+------------------------------------------------+
| Sunday October 2009                            |
+------------------------------------------------+

mysql> select date_format('2007-10-04 22:23:00', '%H:%i:%s');
+------------------------------------------------+
| date_format('2007-10-04 22:23:00', '%H:%i:%s') |
+------------------------------------------------+
| 22:23:00                                       |
+------------------------------------------------+

mysql> select date_format('1900-10-04 22:23:00', '%D %y %a %d %m %b %j');
+------------------------------------------------------------+
| date_format('1900-10-04 22:23:00', '%D %y %a %d %m %b %j') |
+------------------------------------------------------------+
| 4th 00 Thu 04 10 Oct 277                                   |
+------------------------------------------------------------+

mysql> select date_format('1997-10-04 22:23:00', '%H %k %I %r %T %S %w');
+------------------------------------------------------------+
| date_format('1997-10-04 22:23:00', '%H %k %I %r %T %S %w') |
+------------------------------------------------------------+
| 22 22 10 10:23:00 PM 22:23:00 00 6                         |
+------------------------------------------------------------+

mysql> select date_format('1999-01-01 00:00:00', '%X %V'); 
+---------------------------------------------+
| date_format('1999-01-01 00:00:00', '%X %V') |
+---------------------------------------------+
| 1998 52                                     |
+---------------------------------------------+

mysql> select date_format('2006-06-01', '%d');
+------------------------------------------+
| date_format('2006-06-01 00:00:00', '%d') |
+------------------------------------------+
| 01                                       |
+------------------------------------------+

mysql> select date_format('2006-06-01', '%%%d');
+--------------------------------------------+
| date_format('2006-06-01 00:00:00', '%%%d') |
+--------------------------------------------+
| %01                                        |
+--------------------------------------------+

keyword

DATE_FORMAT,DATE,FORMAT

4.6 KiB Raw Blame History