MySQL第一阶段学习总结 一、推荐课程及刷题网站1、写在前面的话虽然现在还没有将MySQL精通,但第一阶段的SQL学习终于告一段落,该做个总结~ 2、MySQL推荐课程 1)B站《尚硅谷MySQL课程》MySQL数据库教程天花板,my… 诚书洞发表于数据分析~... MySQL练习题50题,最好的版本,入门必做! 数据分析王子打开...
select name,population,area from World where area>=3000000or population>=25000000/* Write your T-SQL query statement below */select name,population,area from World where area>=3000000or population>=25000000/* Write your PL/SQL query statement below */select name"name",population"population",area...
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顺序是从 Top interview 150 -> top liked 100: Top acceptance -> lowest acceptance. 344 Rev...Leetcode刷题记录 1. 两数之和 给定一个整数数组 nums 和一个目标值 target,请你在该数组中找出和为目标值的那 两个 整数,并返回他们的数组下标。 你可以假设每种输入只会对应一个答案。但是,你不能...
第三阶段:针对面试的特殊准备,鉴于Leetcode上给了各个公司Tag下最近6个月的常见题目,我在面每家之前都会把该公司(如果Leetcode上有的话)出现过的最近6个月题目按照频率从高往低,至少把Top100 Most Frequent题目刷一遍,很多时候里面只有一半的题目是以前做过的。 第四阶段:由于狗家和某些Pre IPO公司出了名的算法...
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Line 6 Line 7 Line 8 Line 9 Line 10 Your script should output the tenth line, which is: Line 10 我的sql语句如下: SELECT d.name as department, e.name,e.salary FROM Employee e JOIN Department d ON e.departmentid = d.id and
(*) desc limit 1/* Write your T-SQL query statement below */select top 1 customer_number from Ordersgroup by customer_numberorder by count(*) desc/* Write your PL/SQL query statement below */select * from (select customer_number "customer_number" from Ordersgroup by customer_numberorder...
利用HashMap 记录数组元素值和对应的下标,对于一个数 nums[i],判断 target - nums[i] 是否存在 HashMap 中,存在的话,返回两个下标组成的数组。注意,已存在的元素下标在前,当前元素下标在后。 ```java class Solution { public int[] twoSum(int[] nums, int target) { ...
selecttop1customer_numberfromOrders groupbycustomer_number orderbycount(*)desc /* Write your PL/SQL query statement below */ select*from( selectcustomer_number"customer_number"fromOrders groupbycustomer_number orderbycount(*)desc )whererownum=1 ...