一、获取表描述
select table_name,table_comment from information_schema.TABLES where table_schema %s and table_name in (%s)二、获取视图DDL
SELECT * FROM information_schema.views WHERE TABLE_NAME %s and TABLE_SCHEMA %s三、判断表是否存在sql
select table…
算法对比: 使用方法:
SELECT town,max(price) AS max_price,any(population) AS population
FROM uk_xxx_paid
JOIN uk_xxx_table
ON lower(uk_price_paid.town) lower(uk_populations_table.city)
GROUP BY town
ORDER BY max_price DESC
SETTINGS jo…
一.初始化列表
1.引入
我们知道在c11中才能在成员对象声明时初始化,像下面这样。
class Date
{
public:
Date(int year, int month, int day): _year(year), _month(month), _day(day)
{}
private:
int _year2000;
int _month12;
int _day20;
};注意:…