在SQL中，可以使用ORDER BY子句对查询结果进行排序。下面是一些常用的技巧：
按单个列排序： SELECT * FROM table_name ORDER BY column_name ASC/DESC;
按多个列排序： SELECT * FROM table_name ORDER BY column1 ASC/DESC, column2 ASC/DESC;
按列的位置排序： SELECT * FROM table_name ORDER BY 2 ASC/DESC;
按多列不同排序方式： SELECT * FROM table_name ORDER BY column1 ASC, column2 DESC;
按字符串排序： SELECT * FROM table_name ORDER BY column_name COLLATE “NOCASE”;
按NULL值排序： SELECT * FROM table_name ORDER BY column_name NULLS FIRST/LAST;
按条件排序： SELECT * FROM table_name ORDER BY CASE WHEN condition1 THEN 1 WHEN condition2 THEN 2 ELSE 3 END;
按表达式结果排序： SELECT * FROM table_name ORDER BY expression_name;
