Data
Longest Substring Without Repeating Characters
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This problem is asking for the longest substring without repeating characters within a given string. For example, if the input string is "abcabcbb", the output should be 3, since " abc" is the longest substring without repeating characters.
Find all customers who have ordered a product with a price of $10 or more .
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The SQL query below will find the names of all customers who have placed an order for at least one product with a price of $10 or more. SELECT customers.name FR OM customers JOIN orders ON customers.id = orders.customer_id WHERE orders.price >= 10;
Two Sum: Given an array of integers, return the indices of the two numbers...
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The problem is to find the indices of two numbers in an array that add up to a specific target. There is guaranteed to be only one solution.
Joining Two Tables of Data in SQL
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Write a SQL query to join two tables of data and return the results.
Joining Two Tables on a Common Column
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Joining two tables on a common column can be accomplished using a SQL query. The query will return a table with the common ID column and the columns from both Table1 and Table2.
Longest Increasing Subsequence in an Array
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Given an array of integers, this problem looks for the longest subsequence in which the integers appear in increasing order. So, for the given array {3, 5, 2, 7}, the longest increasing subsequence would be {3, 5, 7}.
Find the maximum sum of a contiguous subarray in an array of integers.
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Given an array of n integers, the goal is to find the contiguous subarray whose sum is maximum. For example, given the array [-2, 1, -3, 4, - 1, 2, 1, -5, 4], the maximum sum would be [4, -1, 2, 1], for a sum of 6.
