mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-10-20 07:21:02 +00:00
8623cb232c
* CLICKHOUSE-4063: less manual html @ index.md * CLICKHOUSE-4063: recommend markdown="1" in README.md * CLICKHOUSE-4003: manually purge custom.css for now * CLICKHOUSE-4064: expand <details> before any print (including to pdf) * CLICKHOUSE-3927: rearrange interfaces/formats.md a bit * CLICKHOUSE-3306: add few http headers * Remove copy-paste introduced in #3392 * Hopefully better chinese fonts #3392 * get rid of tabs @ custom.css * Apply comments and patch from #3384 * Add jdbc.md to ToC and some translation, though it still looks badly incomplete * minor punctuation * Add some backlinks to official website from mirrors that just blindly take markdown sources * Do not make fonts extra light * find . -name '*.md' -type f | xargs -I{} perl -pi -e 's//g' {} * find . -name '*.md' -type f | xargs -I{} perl -pi -e 's/ sql/g' {} * Remove outdated stuff from roadmap.md * Not so light font on front page too * Refactor Chinese formats.md to match recent changes in other languages
31 lines
1.2 KiB
Markdown
31 lines
1.2 KiB
Markdown
# Functions for splitting and merging strings and arrays
|
|
|
|
## splitByChar(separator, s)
|
|
|
|
Splits a string into substrings separated by 'separator'.'separator' must be a string constant consisting of exactly one character.
|
|
Returns an array of selected substrings. Empty substrings may be selected if the separator occurs at the beginning or end of the string, or if there are multiple consecutive separators.
|
|
|
|
## splitByString(separator, s)
|
|
|
|
The same as above, but it uses a string of multiple characters as the separator. The string must be non-empty.
|
|
|
|
## arrayStringConcat(arr\[, separator\])
|
|
|
|
Concatenates the strings listed in the array with the separator.'separator' is an optional parameter: a constant string, set to an empty string by default.
|
|
Returns the string.
|
|
|
|
## alphaTokens(s)
|
|
|
|
Selects substrings of consecutive bytes from the ranges a-z and A-Z.Returns an array of substrings.
|
|
|
|
**Example:**
|
|
|
|
```
|
|
SELECT alphaTokens('abca1abc')
|
|
|
|
┌─alphaTokens('abca1abc')─┐
|
|
│ ['abca','abc'] │
|
|
└─────────────────────────┘
|
|
```
|
|
[Original article](https://clickhouse.yandex/docs/en/query_language/functions/splitting_merging_functions/) <!--hide-->
|