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2022年9月14日 #

SQL 1527 Patients With a Condition

摘要: Table: Patients + + + | Column Name | Type | + + + | patient_id | int | | patient_name | varchar | | conditions | varchar | + + + patient_id is the pr 阅读全文

posted @ 2022-09-14 16:10 Blackzxy 阅读(34) 评论(0) 推荐(0) 编辑

SQL 1484 Group Sold Products By The Date

摘要: Table Activities: + + + | Column Name | Type | + + + | sell_date | date | | product | varchar | + + + There is no primary key for this table, it may c 阅读全文

posted @ 2022-09-14 06:17 Blackzxy 阅读(34) 评论(0) 推荐(0) 编辑

2022年9月13日 #

SQL 1667 Fix Names in a Table

摘要: Table: Users + + + | Column Name | Type | + + + | user_id | int | | name | varchar | + + + user_id is the primary key for this table. This table conta 阅读全文

posted @ 2022-09-13 17:30 Blackzxy 阅读(23) 评论(0) 推荐(0) 编辑

SQL196 Delete Duplicate Emails

摘要: Table: Person + + + | Column Name | Type | + + + | id | int | | email | varchar | + + + id is the primary key column for this table. Each row of this 阅读全文

posted @ 2022-09-13 16:09 Blackzxy 阅读(12) 评论(0) 推荐(0) 编辑

SQL 627 Swap Salary

摘要: Table: Salary + + + | Column Name | Type | + + + | id | int | | name | varchar | | sex | ENUM | | salary | int | + + + id is the primary key for this 阅读全文

posted @ 2022-09-13 04:10 Blackzxy 阅读(10) 评论(0) 推荐(0) 编辑

SQL 1873 Calculate Special Bonus

摘要: Table: Employees + + + | Column Name | Type | + + + | employee_id | int | | name | varchar | | salary | int | + + + employee_id is the primary key for 阅读全文

posted @ 2022-09-13 03:46 Blackzxy 阅读(58) 评论(0) 推荐(0) 编辑

2022年9月12日 #

[Google] LeetCode 839 Similar String Groups 并查集

摘要: Two strings X and Y are similar if we can swap two letters (in different positions) of X, so that it equals Y. Also two strings X and Y are similar if 阅读全文

posted @ 2022-09-12 17:16 Blackzxy 阅读(14) 评论(0) 推荐(0) 编辑

2022年9月11日 #

SQL 584 Find Customer Referee

摘要: Table: Customer + + + | Column Name | Type | + + + | id | int | | name | varchar | | referee_id | int | + + + id is the primary key column for this ta 阅读全文

posted @ 2022-09-11 06:03 Blackzxy 阅读(15) 评论(0) 推荐(0) 编辑

SQL 1757 Recyclable and Low Fat Products

摘要: Table: Products + + + | Column Name | Type | + + + | product_id | int | | low_fats | enum | | recyclable | enum | + + + product_id is the primary key 阅读全文

posted @ 2022-09-11 05:04 Blackzxy 阅读(37) 评论(0) 推荐(0) 编辑

SQL 595 Big Countries

摘要: Table: World + + + | Column Name | Type | + + + | name | varchar | | continent | varchar | | area | int | | population | int | | gdp | int | + + + nam 阅读全文

posted @ 2022-09-11 04:41 Blackzxy 阅读(19) 评论(0) 推荐(0) 编辑

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