转自:http://bbs.csdn.net/topics/300191423 从第一引号向后,如果遇到第二个引号,则看这个引号后面时候有紧挨着的引号,如果有则第二个引号被转义,即该保留该引号后面紧跟的那个引号.用法举例:declare v_char varchar2(2) :='zz';beginexecute immediate 'delete from aa where b='||''''||v_char||'''';end;或者declare v_char varchar2(2) :='
Clearly, the program created by the Xamarin.Forms template is very simple, so this is an excellent opportunity to examine the generated code files and figure out their interrelationships and how they work. Let’s begin with the code that’s responsible
今天,我遇到了一个sybase数据库查询的问题.一句简单的sql,但是不知道为什么查询不出来,导致生产生产服务器频频挂掉.吓得我的小心脏砰砰啊. select DISTINCT A.FCIL_CDE as fcilCde from DND_EVENT_LOG A WHERE A.DOC_REF =? AND A.DOC_TYPE = ? AND A.START_OR_END = 'S' 后来,经网络运营经理查询,原来是客户传递的参数中包含了特殊字符,即全角空格的转义(\u00a0). 原因是由于
为什么要对字符串编码? 某些字符串中包含html标签,不编码,页面输出就乱了. PHP下怎么对字符串编码? htmlentities vs htmlspecialchars htmlentities 与htmlspecialchar 区别: htmlentities is identical to htmlspecialchars() in all ways, except with htmlentities(), all characters which have HTML character