【SQL开发实战技巧】系列：SQL排序的那些事

在SQL中，我们经常需要根据某些列的值对结果集进行排序。这可以通过ORDER BY子句来完成。

1. 按列名排序

SELECT column_name(s)
FROM table_name
ORDER BY column_name;

2. 按列名进行升序排序

SELECT column_name(s)
FROM table_name
ORDER BY column_name ASC;

3. 按列名进行降序排序

SELECT column_name(s)
FROM table_name
ORDER BY column_name DESC;

4. 按多个列进行排序

SELECT column_name(s)
FROM table_name
ORDER BY column1, column2, ...;

5. 按函数排序

SELECT column_name(s)
FROM table_name
ORDER BY ABS(column_name);

6. 按别名排序

SELECT column_name AS alias_name
FROM table_name
ORDER BY alias_name;

7. 按表达式排序

SELECT column_name(s)
FROM table_name
ORDER BY column1 + column2;

8. 按关联子查询排序

SELECT column_name(s)
FROM table_name
ORDER BY (SELECT column_name FROM table_name WHERE condition);

9. 使用LIMIT限制输出结果

SELECT column_name(s)
FROM table_name
ORDER BY column_name
LIMIT number;

10. 使用OFFSET跳过特定数量的结果

SELECT column_name(s)
FROM table_name
ORDER BY column_name
LIMIT number OFFSET starting_point;

注意：ORDER BY子句应该放在SELECT语句的最后，除非你使用了WITH子句（Common Table Expressions, CTES）。