数据库函数比较：修订间差异
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（创建页面，内容为“=== MySQL - Doris === {| class="wikitable" |Type |MySQL |Doris |Result |- |Json |select j1 -> '$."v1"' from ( select cast('{"v1":"10", "v2":"11"}' as json) j1 ) o <nowiki>;</nowiki> | |"10" |- |Json |select JSON_EXTRACT(cast('{"v1":"10", "v2":"11"}' as json), '$."v1"') |= |"10" |- |String |select trim('"10"', '"') |= |10 |- | | | | |}”） |
无编辑摘要 |
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| 第1行： | 第1行： | ||
=== | === Json === | ||
{| class="wikitable" | {| class="wikitable" | ||
|Type | |Type | ||
| 第29行： | 第29行： | ||
| | | | ||
| | | | ||
|} | |||
=== Date === | |||
{| class="wikitable" | |||
| | |||
|MySQL | |||
|Clickhouse | |||
|Oracle | |||
|Result | |||
|- | |||
|转字符串 | |||
|date_format(now(), '%Y%m%d%H%m%S') | |||
|toYYYYMMDDhhmmss(now()) | |||
|to_char(sysdate, 'yyyymmddhh24miss') | |||
|20231129103552 | |||
|- | |||
|日期增 | |||
|adddate(now(), 10) | |||
|date_add(day, 10, now()) | |||
|sysdate + 10 | |||
|2023/11/19 10:18:10 | |||
|- | |||
|日期减 | |||
|subdate(now(), 10) | |||
|date_sub(day, 10, now()) | |||
|sysdate - 10 | |||
|2023/12/9 10:16:22 | |||
|} | |||
=== Rand === | |||
{| class="wikitable" | |||
| | |||
|MySQL | |||
|Clickhouse | |||
|Oracle | |||
|Result | |||
|- | |||
|随机数 | |||
|cast(rand() * 1000 as int) | |||
|trunc(rand()/10000000) | |||
|dbms_random.value(0,1000) | |||
|121 | |||
|} | |} | ||
2023年11月29日 (三) 10:57的版本
Json
| Type | MySQL | Doris | Result |
| Json | select j1 -> '$."v1"'
from ( select cast('{"v1":"10", "v2":"11"}' as json) j1 ) o ; |
"10" | |
| Json | select JSON_EXTRACT(cast('{"v1":"10", "v2":"11"}' as json), '$."v1"') | = | "10" |
| String | select trim('"10"', '"') | = | 10 |
Date
| MySQL | Clickhouse | Oracle | Result | |
| 转字符串 | date_format(now(), '%Y%m%d%H%m%S') | toYYYYMMDDhhmmss(now()) | to_char(sysdate, 'yyyymmddhh24miss') | 20231129103552 |
| 日期增 | adddate(now(), 10) | date_add(day, 10, now()) | sysdate + 10 | 2023/11/19 10:18:10 |
| 日期减 | subdate(now(), 10) | date_sub(day, 10, now()) | sysdate - 10 | 2023/12/9 10:16:22 |
Rand
| MySQL | Clickhouse | Oracle | Result | |
| 随机数 | cast(rand() * 1000 as int) | trunc(rand()/10000000) | dbms_random.value(0,1000) | 121 |