Db 类来实现。，，``php，$db = M('table_name'); // 实例化模型，$data = $db>where('column_name=1')>select(); // 执行查询，``Db 类来实现。，，``php，$db = M('table_name'); // 实例化模型，$data = $db>where('column_name=1')>select(); // 执行查询，``php，，``php，$sql = "SELECT a.*, b.* FROM table1 AS a JOIN table2 AS b ON a.id = b.a_id WHERE a.status = 1";，$result = $db>query($sql);，while ($row = $result>fetch_assoc()) {， // 处理查询结果，}，``，，这段代码展示了如何在 PHPCMS 中执行一个简单的连表查询，并遍历结果集。php，，``where 方法，结合条件数组实现。if 语句或 switch 语句来根据不同的条件执行相应的代码。INSERT INTO ... SELECT语句来追加查询数据。，，``sql，INSERT INTO table1 (column1, column2)，SELECT column1, column2，FROM table2，WHERE condition;，``Powered By Z-BlogPHP 1.7.3
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