代价最高的SQL select OPTIMIZER_COST,EXECUTIONS,sql_text from v$sqlarea where OPTIMIZER_COST> (select max(OPTIMIZER_COST)/5 from v$sqlarea); IO最高的SQL select round(DISK_READS/EXECUTIONS) ,DISK_READS,EXECUTI
Promise和async/await提供异步并发能力,适用于单次I/O任务的场景开发,本文以使用异步进行单次文件写入为例来提供指导。 实现单次I/O任务逻辑。 import fs from '@ohos.file.fs';import common from '@ohos.app.ability.common';async function write(data: string, fil
问题SQL: select p.person_id as personId, p.person_name as personName, p.native_place as nativePlace, ci.company_name as companyName, pp.seal_number as sealNumber, GROUP_CONCAT(pp.major) as major, pp.re