目录引言前期准备连接到mysql并设置一个示例数据库使用WHERE子句过滤数据比较Null（IS NULL）区间（BETWEEN）包含（IN）通配符（%和_）用AND和OR组合多个查询条件用NOT排除结果总结引言
When I started to write the first SQL-Statements in my programs I felt quite comfortable with protecting myself against SQL-Injection with a very simple method that a colleague showed me. It replaced
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