準備 156 個流行的真實世界 SQL 面試問題,並自信地走進面試,對於你會被問的各類型問題胸有成竹。 給面試官留下深刻的印象
測驗包含以下資料庫和 SQL 主題的問題:
Databases Core Concepts
Normalization (First Normal Form, Second Normal Form, Third Normal Form)
Relationships
SQL Queries Basics
SELECT statement and syntax
SQL Data Types
WHERE operators: comparison operators, LIKE, BETWEEN, IN
Scalar Functions
Aggregate Functions (SUM, COUNT, MIN, MAX, AVG)
GROUP BY
ORDER BY
JOINS (INNER JOIN, RIGHT and LEFT JOIN, OUTER JOIN, CROSS JOIN)
Set Theory (INTERSECT, UNION, MINUS)
Subqueries
INSERT, UPDATE, DELETE
DML vs DDL vs DCL
DDL: CREATE, DROP, ALTER
Constraints
Indexes
DCL privileges: GRANT, REVOKE
Transactions
Views
Triggers
Cursors
https://softnshare.com/2018/06/09/sql-interview-questions/
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What is Cross Join in SQL ? The SQL CROSS JOIN produces a result set which is the number of rows in the first table multiplied by the number ... ... <看更多>
cross joins in sql 在 SQL Cartesian Product | What is SQL Cross Join? - YouTube 的推薦與評價
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AutomationTestingInsider #SQLCrossJoinIn this video, we will discuss about SQL Tutorial Part 18 | SQL Cross Join | SQL Cartesian Product ... ... <看更多>
cross joins in sql 在 SQL cross join 的語法差異 的推薦與評價
今天遇到了一個sql join 的語法問題,首先第一個sql 如下: 123SELECT c.customer_id, o.order_id, o.order_date FROM customers as c JOIN orders as ... ... <看更多>