About me:Oracle ACE pro,optimistic,passionate and harmonious. Focus on ORACLE,MySQL and other database programming,peformance tuning,db design, j2ee,Linux/AIX,Architecture tech,etc
全部博文(191)
发布时间:2013-05-13 22:26:08
在Oracle中,字符串的字面量如果含有单引号,那么必须转义,而且转义符是单引号',这样加上表示字符串字面量的外层'',那么势必要写很多单引号,不仅可读性降低,而且容易出错。当然,使用chr(39),也可以代替引号,可能比写多个单引号更好,可读性强,但是毕竟这种写法不是很常见。SO,在10g中,Oracle引入了q-quote的用法。......【阅读全文】
发布时间:2013-05-01 21:21:13
这是来自于ITPUB一网友提出的问题:如题
有使用绑定变量还不如不使用绑定变量的情况吗?
主要是执行效率方面......【阅读全文】
吻的感觉适2025-07-18 23:11
https://txc.qq.com/products/762795/blog/2019636
https://txc.qq.com/products/762801/blog/2019637
https://txc.qq.com/products/762763/blog/2019638
https://txc.qq.com/products/762772/blog/2019639
https://txc.qq.com/products/762790/blog/2019641
https://txc.qq.com/products/762758/blog/2019640
https://txc.qq.com/products/762786/blog/2019642
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https://txc.qq.com/products/762787/blog/2019648
https://txc.qq.com/products/762799/blog/2019649
https://txc.qq.com/products/762775/blog/2019650
https://txc.qq.com/products/762759/blog/2019651
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https://txc.qq.com/products/762855/blog/2019654