我们日常使用的数据库主要包括Oracle、MySQL、DB2和SQL Server等。在操作Oracle数据库时，PL/SQL是匹配度最高的工具之一。那么如何利用PL/SQL创建定时任务？接下来将简要介绍通过该工具实现定时器功能的具体步骤与方法。

在12月“DB-Engines关系型数据库排行榜”中，国产数据库TiDB、OceanBase、阿里云PolarDB分列44、52、53位；南大通用GBase数据库在关系型数据库中全球排名第61位，较去年同期（77位）提升16名，排名国产数据库第四名；腾讯TDSQL数据库（77位）和华为OpenGauss数据库（79位）则紧随其后，分别位列国产数据库第五、六名。

CDA企业认可度非常高，很多企业招聘时注明CDA数据分析师优先，对找工作非常有帮助。很多银行、金融机构的技术岗会要求必须是CDA数据分析师二级以上的持证人。中国联通、央视广信、德勤、苏宁等企业，把CDA持证人列入优先考虑或者对员工的CDA考试给补贴。

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