SQL-CREATE TABLE-INSERT INTO

SQL

Welcome to SQL | Intro to SQL: Querying and managing data | Computer programming | Khan Academy

SQL-CREATE TABLE-INSERT INTO

Challenge: Book list database | SQL basics | Intro to SQL: Querying and managing data | Computer programming | Computing | Khan Academy

check grammar:"Database is a program. It can store data. Database can add, modify, and query data very fast."

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Your sentences are almost correct. Here's a slight adjustment for better flow:

"A database is a program that can store data. It can also quickly add, modify, and query data."

check grammar:"Database can add, modify, and query data very fast."

ChatGPT

Your sentence is grammatically correct. However, for better readability, you could consider adding some articles:

"The database can quickly add, modify, and query data."

1. A database is used to store and organize data.
2. Make a database table to store them in.
3. Create a table to store your list of books.
4. It should have columns for id, name, and rating.

What are your favorite books? You can make a database table to store them in! In this first step, create a table to store your list of books. It should have columns for id, name, and rating.

CREATE TABLE groceries (id INTEGER PRIMARY KEY, name TEXT, quantity INTEGER );

INSERT INTO groceries VALUES (1, "Bananas", 4); INSERT INTO groceries VALUES (2, "Peanut Butter", 1); INSERT INTO groceries VALUES (3, "Dark chocolate bars", 2); SELECT * FROM groceries;

DB 期中考題庫解說

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SQL Constraints 限制 - SQL 語法教學 Tutorial

SQL Constraint 限制

Constraint 用來有條件地限制哪些資料才可以被存入資料表中，也就是對欄位作約束。這些限制可以在建立資料表時 CREATE TABLE 指定條件，或是之後再修改 ALTER TABLE 指定。

SQL 有哪幾種類型的限制條件？

• NOT NULL 非空值限制
• UNIQUE 唯一限制
• PRIMARY KEY 主鍵限制
• FOREIGN KEY 外鍵限制
• CHECK 檢查限制
• DEFAULT 預設值限制

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