ORA-00936：缺少表达

Question

    String sql="SELECT room_no, suite_type, bed_type, suite_cost FROM room_detail "    
             + "where room_no NOT IN "+
             + "(SELECT room_no FROM booking_table WHERE DATE(date_out) >= '" 
             + strdtver1 
             + "' AND DATE(date_in) <= '" 
             + strdtver2 
             + "')";

Answer 1

在比较之前，您需要将变量strdtver1格式化为日期类型。

因此，您的查询需要像以下内容一样进行更改：

 String sql="SELECT room_no, suite_type, bed_type, suite_cost FROM room_detail "    
+ "where room_no NOT IN "+
+ "(SELECT room_no FROM booking_table WHERE TO_DATE(date_out,'DD-MON-YY') >= to_date('" 
+ strdtver1 
+ "','DD-MON-YY') AND TO_DATE(date_in,'DD-MON-YY') <= to_date('" 
+ strdtver2 
+ "','DD-MON-YY') )";

此外，您不需要在查询字符串中使用分号。