string-functions: add instructions for using CONCAT() and CONCAT_WS()

[Weaxs]

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Fix #15484

This PR adds instructions for the string functions CONCAT() and CONCAT_WS().

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• This PR is translated from: string-functions: add instructions for using CONCAT() and CONCAT_WS() docs-cn#16086
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[Weaxs]

/label 2024-tidb-docs-dash

[Weaxs]

/translation from-docs-cn

[dveeden]

Maybe add an example with a separator that's multiple characters.

sql> SELECT CONCAT_WS('-','Ti','DB');
+--------------------------+
| CONCAT_WS('-','Ti','DB') |
+--------------------------+
| Ti-DB                    |
+--------------------------+
1 row in set (0.0011 sec)

sql> SELECT CONCAT_WS('---','Ti','DB');
+----------------------------+
| CONCAT_WS('---','Ti','DB') |
+----------------------------+
| Ti---DB                    |
+----------------------------+
1 row in set (0.0011 sec)

[dveeden]

/verify

[rpaik]

Thanks for participating in TiDB Docs Dash @Weaxs!

[dveeden]

From the linter:

[2024-01-09T15:39:24.168Z] functions-and-operators/string-functions.md: this file has manual line breaks in the following lines:
[2024-01-09T15:39:24.168Z] 
[2024-01-09T15:39:24.168Z] MANUAL LINE BREAKS: L135
[2024-01-09T15:39:24.168Z] MANUAL LINE BREAKS: L146
[2024-01-09T15:39:24.168Z] MANUAL LINE BREAKS: L163
[2024-01-09T15:39:24.168Z] MANUAL LINE BREAKS: L195
[2024-01-09T15:39:24.168Z] MANUAL LINE BREAKS: L217
[2024-01-09T15:39:24.168Z] MANUAL LINE BREAKS: L441

[qiancai]

Hi @Weaxs, I've submitted the commit 1491dc6 to align this PR with the Chinese doc changes in pingcap/docs-cn#16086. Would you please check if the commit is OK? Thanks.

[qiancai]

/test pull-verify

[Weaxs]

Hi @Weaxs, I've submitted the commit 1491dc6 to align this PR with the Chinese doc changes in pingcap/docs-cn#16086. Would you please check if the commit is OK? Thanks.

I've checked the commit and it looks OK.

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-01-26 10:05:33.879272863 +0000 UTC m=+1127975.443570567: ☑️ agreed by dveeden.
• 2024-01-30 03:53:24.103229742 +0000 UTC m=+1451245.667527432: ☑️ agreed by hfxsd.

[qiancai]

/retest

[qiancai]

/approve

[ti-chi-bot]

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