数字

输出数字。

SELECT 123 AS r1, 8.4 AS r2 FROM kv

r1	r2
123	8.4

加减乘除。

SELECT 1 + 2 AS 加法, 7 - 2 AS 减法, 3 * 4 AS 乘法, 7 / 2 AS 除法 FROM kv

加法	减法	乘法	除法
3	5	12	3.5

加减乘除。

SELECT add(1, 2) AS 加法, subtract(7, 2) AS 减法, multiply(3, 4) AS 乘法, divide(7, 2) AS 除法 FROM kv

加法	减法	乘法	除法
3	5	12	3.5