结构化查询语言（SQL）是数据库管理和操作的核心工具，它提供了一系列函数来处理数据、执行计算和转换数据格式。SQL 函数可以分为几大类，包括聚合函数、字符串函数、数学函数、日期和时间函数、转换函数等。掌握这些函数对于高效地操作数据库至关重要。本文将详细介绍这些常见的 SQL 函数，并提供一些使用示例，帮助读者更好...

问答 2023-10-18 来自：开发者社区

问下函数配置了vpc 访问同vpc下的云数据库 RDS 和云数据库Redis版内网链接会有延

问下函数配置了vpc 访问同vpc下的云数据库 RDS 和云数据库Redis版内网链接会有延迟而且延迟时间也不稳定这个怎么解决？

问答 2023-10-16 来自：开发者社区

函数计算，自定义运行时如何在函数周期初始化时做数据库资源变量缓存？

问答 2023-09-12 来自：开发者社区

函数计算，请问一下1.在并发比较大的情况，fc内的函数经常出现连接不上数据库，导致fc函数执行超时的

函数计算，请问一下1.在并发比较大的情况，fc内的函数经常出现连接不上数据库，导致fc函数执行超时的情况，然后我看了一下发生这种情况时间段数据库的指标都没什么问题。想问一下可能是什么原因导致的。还有这种错误日志，日志里也是空的。不知道错误原因

文章 2023-08-01 来自：开发者社区

PHPMySQL防注入如何使用安全的函数保护数据库

在进行PHP编程开发时，安全性一直是开发人员必须注意的问题，其中最重要的是防止SQL注入攻击。SQL注入攻击是指通过输入恶意代码来攻击数据库的一种方式，攻击者通过输入SQL语句来绕过程序的安全机制，达到控制和操作数据库的目的。为了避免这种安全问题的发生，本文将介绍如何使用安全的函数保护数据库。 PHPMySQL防注入如何使用...

共有31条

< 1 2 3 4 >

跳转至： GO

更新时间 2024-11-08 18:30:37

本页面内关键词为智能算法引擎基于机器学习所生成，如有任何问题，可在页面下方点击"联系我们"与我们沟通。

数据库您可能感兴趣

产品推荐

{"optioninfo":{"dynamic":"ture","static":"true"},"simplifiedDisplay":"newEdition","newCard":[{"ifIcon":"img","link":"https://img.alicdn.com/tfs/TB1XY8hGYr1gK0jSZFDXXb9yVXa-1740-328.png","icon":"","iconImg":"https://img.alicdn.com/tfs/TB1nmXJn7cx_u4jSZFlXXXnUFXa-200-200.png","contentLink":"https://www.aliyun.com/product/dbaudit","title":"数据库审计","des":"满足等保2.0二级和三级 “安全审计”合规要求的同时，智能解析数据库通信流量，细粒度审计数据库访问行为，通过对数据库全量行为的审计溯源、危险攻击的实时告警、风险语句的智能预警，提供数据库资产最安全的监控保障。","link1":"https://yundun.console.aliyun.com/?spm=5176.14517109.nav-right.2.3bf5oPqioPqiaM&p=dbaudit#/c100/cn-hangzhou","btn1":"产品控制台","link2":"https://common-buy.aliyun.com/?spm=5176.139959.J_5253785160.3.42de77d7KNxtZZ&commodityCode=dbaudit#/buy","btn2":"立即购买","btn3":"产品文档","link3":"https://help.aliyun.com/product/52432.html?spm=5176.139959.J_5253785160.5.42de77d7KNxtZZ","infoGroup":[{"infoName":"精选推荐","infoContent":{"firstContentName":"7天免费试用体验","firstContentLink":"https://page.aliyun.com/form/act803688306/index.htm?spm=5176.139959.J_6302206100.1.42de77d7KNxtZZ","lastContentLink":"https://common-buy.aliyun.com/?spm=5176.139959.J_6302206100.2.42de77d7KNxtZZ&commodityCode=dbaudit#/buy","lastContentName":"包年享85折优惠"}},{"infoName":"用户指南","infoContent":{"firstContentName":"产品快速入门","lastContentName":"常见问题","firstContentLink":"https://help.aliyun.com/document_detail/122013.html?spm=a2c4g.11174283.6.550.1f412bc5vmA86L","lastContentLink":"https://help.aliyun.com/document_detail/158575.html?spm=a2c4g.11174283.6.587.1f412bc5vmA86L"}}]}],"card":[],"search":[],"infoCard":[{"bannerUrl":"https://img.alicdn.com/tfs/TB1Xf81a3gP7K4jSZFqXXamhVXa-5169-974.jpg","bannerTitle":"数据库审计","bannerContent":"满足等保2.0二级和三级 “安全审计”合规要求的同时，智能解析数据库通信流量，细粒度审计数据库访问行为，通过对数据库全量行为的审计溯源、危险攻击的实时告警、风险语句的智能预警，提供数据库资产最安全的监控保障。","liveButtonName":"查看详情","liveButtonLink":"https://www.aliyun.com/product/dbaudit?spm=5176.21213303.8115314850.1.faf453c9I9EKNe&scm=20140722.S_card@@%E5%8D%A1%E7%89%87@@1796._.ID_card@@%E5%8D%A1%E7%89%87@@1796-RL_%E6%95%B0%E6%8D%AE%E5%BA%93%E5%AE%A1%E8%AE%A1-OR_ser-V_2-P0_0","contentTitle":"满足等保2.0’安全审计‘的合规要求","homePageLink":"https://page.aliyun.com/form/act803688306/index.htm","homePageName":"7天试用","linkGroup":[{"linkContent":"发布包大小极致优化，节省流量和存储。"},{"linkContent":"服务迭代不再受发版限制，快速发布，快速迭代。"},{"linkContent":"业务开发效率更加优秀，一次开发，多端运行。"}]}],"title":{"mainTitle":"数据库审计","subtitle":"满足等保2.0二级和三级 “安全审计”合规要求的同时，智能解析数据库通信流量，细粒度审计数据库访问行为，通过对数据库全量行为的审计溯源、危险攻击的实时告警、风险语句的智能预警，提供数据库资产最安全的监控保障。","linkUrl":"https://www.aliyun.com/product/dbaudit?spm=5176.21213303.8115314850.1.faf453c9I9EKNe&scm=20140722.S_card@@%E5%8D%A1%E7%89%87@@1796._.ID_card@@%E5%8D%A1%E7%89%87@@1796-RL_%E6%95%B0%E6%8D%AE%E5%BA%93%E5%AE%A1%E8%AE%A1-OR_ser-V_2-P0_0","btnText":"查看详情"},"visual":{"topbg":"https://img.alicdn.com/tfs/TB1bQuBIYH1gK0jSZFwXXc7aXXa-3840-740.gif","icon":"","textColor":"dark"},"dataList":[{"summary":"啦啦啦","author":"wuwu","linksUrl":"#"}],"sceneCard":[],"txt":[]}

{"$env":{"JSON":{}},"$page":{"env":"production"},"$context":{"optioninfo":{"dynamic":"ture","static":"true"},"simplifiedDisplay":"newEdition","newCard":[{"ifIcon":"img","link":"https://img.alicdn.com/tfs/TB1XY8hGYr1gK0jSZFDXXb9yVXa-1740-328.png","icon":"","iconImg":"https://img.alicdn.com/tfs/TB1nmXJn7cx_u4jSZFlXXXnUFXa-200-200.png","contentLink":"https://www.aliyun.com/product/dbaudit","title":"数据库审计","des":"满足等保2.0二级和三级 “安全审计”合规要求的同时，智能解析数据库通信流量，细粒度审计数据库访问行为，通过对数据库全量行为的审计溯源、危险攻击的实时告警、风险语句的智能预警，提供数据库资产最安全的监控保障。","link1":"https://yundun.console.aliyun.com/?spm=5176.14517109.nav-right.2.3bf5oPqioPqiaM&p=dbaudit#/c100/cn-hangzhou","btn1":"产品控制台","link2":"https://common-buy.aliyun.com/?spm=5176.139959.J_5253785160.3.42de77d7KNxtZZ&commodityCode=dbaudit#/buy","btn2":"立即购买","btn3":"产品文档","link3":"https://help.aliyun.com/product/52432.html?spm=5176.139959.J_5253785160.5.42de77d7KNxtZZ","infoGroup":[{"infoName":"精选推荐","infoContent":{"firstContentName":"7天免费试用体验","firstContentLink":"https://page.aliyun.com/form/act803688306/index.htm?spm=5176.139959.J_6302206100.1.42de77d7KNxtZZ","lastContentLink":"https://common-buy.aliyun.com/?spm=5176.139959.J_6302206100.2.42de77d7KNxtZZ&commodityCode=dbaudit#/buy","lastContentName":"包年享85折优惠"}},{"infoName":"用户指南","infoContent":{"firstContentName":"产品快速入门","lastContentName":"常见问题","firstContentLink":"https://help.aliyun.com/document_detail/122013.html?spm=a2c4g.11174283.6.550.1f412bc5vmA86L","lastContentLink":"https://help.aliyun.com/document_detail/158575.html?spm=a2c4g.11174283.6.587.1f412bc5vmA86L"}}]}],"card":[],"search":[],"infoCard":[{"bannerUrl":"https://img.alicdn.com/tfs/TB1Xf81a3gP7K4jSZFqXXamhVXa-5169-974.jpg","bannerTitle":"数据库审计","bannerContent":"满足等保2.0二级和三级 “安全审计”合规要求的同时，智能解析数据库通信流量，细粒度审计数据库访问行为，通过对数据库全量行为的审计溯源、危险攻击的实时告警、风险语句的智能预警，提供数据库资产最安全的监控保障。","liveButtonName":"查看详情","liveButtonLink":"https://www.aliyun.com/product/dbaudit?spm=5176.21213303.8115314850.1.faf453c9I9EKNe&scm=20140722.S_card@@%E5%8D%A1%E7%89%87@@1796._.ID_card@@%E5%8D%A1%E7%89%87@@1796-RL_%E6%95%B0%E6%8D%AE%E5%BA%93%E5%AE%A1%E8%AE%A1-OR_ser-V_2-P0_0","contentTitle":"满足等保2.0’安全审计‘的合规要求","homePageLink":"https://page.aliyun.com/form/act803688306/index.htm","homePageName":"7天试用","linkGroup":[{"linkContent":"发布包大小极致优化，节省流量和存储。"},{"linkContent":"服务迭代不再受发版限制，快速发布，快速迭代。"},{"linkContent":"业务开发效率更加优秀，一次开发，多端运行。"}]}],"title":{"mainTitle":"数据库审计","subtitle":"满足等保2.0二级和三级 “安全审计”合规要求的同时，智能解析数据库通信流量，细粒度审计数据库访问行为，通过对数据库全量行为的审计溯源、危险攻击的实时告警、风险语句的智能预警，提供数据库资产最安全的监控保障。","linkUrl":"https://www.aliyun.com/product/dbaudit?spm=5176.21213303.8115314850.1.faf453c9I9EKNe&scm=20140722.S_card@@%E5%8D%A1%E7%89%87@@1796._.ID_card@@%E5%8D%A1%E7%89%87@@1796-RL_%E6%95%B0%E6%8D%AE%E5%BA%93%E5%AE%A1%E8%AE%A1-OR_ser-V_2-P0_0","btnText":"查看详情"},"visual":{"topbg":"https://img.alicdn.com/tfs/TB1bQuBIYH1gK0jSZFwXXc7aXXa-3840-740.gif","icon":"","textColor":"dark"},"dataList":[{"summary":"啦啦啦","author":"wuwu","linksUrl":"#"}],"sceneCard":[],"txt":[]}}