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GBase 8s V8.8 SQL 指南:教程-5.4
2022-04-22 05:24:00 【GBASE数据库】
5.4 总结
本章介绍了在基本 SELECT 语句中用来查询关系数据库和处理返回数据的函数的样本语
法和结果。在 SELECT 语句中使用函数 显示如何执行以下操作:
• 在 Projection 子句中使用聚集函数来计算并检索特定数据。
• 在 SELECT 语句中包括时间函数 DATE 、DAY 、MDY 、MONTH 、
WEEKDAY 、YEAR 、CURRENT 和 EXTEND 以及 TODAY 、LENGTH 和
USER 函数。
• 在 SELECT 子句中使用转换函数来在日期与字符串之间转换。
• 在 SELECT 子句中使用字符串处理函数来转换大写和小写字母或以各种方法处理
字符串。
版权声明
本文为[GBASE数据库]所创,转载请带上原文链接,感谢
https://blog.csdn.net/weixin_47390342/article/details/124326208
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