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查询表
学习如何使用 SQL 查询查看数据库。
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1SELECT * FROM employees;
Table
| ID | First Name | Last Name | Department | Salary |
|---|---|---|---|---|
| 1 | Alice | Kim | Marketing | 75,000 |
| 2 | Raj | Patel | Engineering | 95,000 |
| 3 | Maria | Lopez | Finance | 88,000 |
| 4 | David | Nguyen | Engineering | 102,000 |
| 5 | Sofia | Rossi | Design | 72,000 |
| 6 | James | Olsen | Sales | 68,000 |
| 7 | Lina | Chen | HR | 64,000 |
| 8 | Omar | Hassan | Operations | 85,000 |
| 9 | Ethan | Brown | Support | 58,000 |
| 10 | Isabella | Garcia | Engineering | 97,000 |
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1SELECT first_name, department 2FROM employees;
1-- Write your query here:
Table
| SQL Keyword | What It Means | Example |
|---|---|---|
| SELECT | Pick which columns to show | SELECT name, salary |
| FROM | Tell SQL which table to use | FROM employees |
| * | Shortcut for “all columns” | SELECT * |