Page 26 - Modular_V2.0_SQL_Flipbook

Periodic Assessment-1

(Based on chapters 1 & 2)

A. Identify the correct command used for the given operations.
1. To create a new table in the database. ……………………

2. To modify the structure of an existing table. ……………………

3. To retrieve data from a table. ……………………
4. To update existing records in a table. ……………………

5. To grant user privileges on a database. ……………………

6. To save changes made in a transaction. ……………………
7. To remove a table and its data. ……………………

8. To delete specific records from a table. ……………………

B. Choose the most appropriate data type in MySQL for each case.

1. You need to store a product's price, such as 15.99. ……………………

2. You need to store the full name of an employee, but the length of the name
can vary. ……………………
3. You need to store a user's birthdate in the format YYYY/MM/DD. ……………………

4. You are creating a database to store the exact time a meeting starts, such as
14:30:00. ……………………

5. You need to store a person's age, which is a whole number (e.g., 25). ……………………

C. Define the following terms:

1. NULL Constraint

…………………………………………………………………………………………………………………………………………………………
2. NOT NULL Constraint

…………………………………………………………………………………………………………………………………………………………

3. Primary Key Constraint

…………………………………………………………………………………………………………………………………………………………
4. Composite Primary Key

…………………………………………………………………………………………………………………………………………………………

5. Unique Constraint
…………………………………………………………………………………………………………………………………………………………

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