Given an Employee table with columns for salary and dept, to raise the salaries of all employees in the sales department by 10%, we could write O A UPDATE salary SET salary = salary*1.10 WHERE dept='sales'; OB. UPDATE Employee SET salary = 1.10 WHERE dept='sales'; O CUPDATE Employee LET salary = salary*1.10 WHERE dept='sales'; O D.UPDATE Employee SET salary = salary*1.10 WHERE dept='sales';

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### SQL Update Statements to Increase Salary

Given an Employee table with columns for `salary` and `dept`, to raise the salaries of all employees in the sales department by 10%, we could write one of the following SQL statements:

1. **Option A:** 
   ```sql
   UPDATE salary SET salary = salary*1.10 WHERE dept='sales';
   ```

2. **Option B:** 
   ```sql
   UPDATE Employee SET salary = 1.10 WHERE dept='sales';
   ```

3. **Option C:** 
   ```sql
   UPDATE Employee LET salary = salary*1.10 WHERE dept='sales';
   ```

4. **Option D:** 
   ```sql
   UPDATE Employee SET salary = salary*1.10 WHERE dept='sales';
   ```

### Analysis

- **Option A:** Incorrect. Using `UPDATE salary` is not appropriate since `salary` is a column, not a table.
  
- **Option B:** Incorrect. This statement sets the `salary` column to a constant value of `1.10`, which means it won't increase the salary by 10% correctly.

- **Option C:** Incorrect. The use of `LET` is syntactically incorrect in the context of an SQL `UPDATE` statement.

- **Option D:** Correct. This statement accurately reflects the intention to update the `salary` column by multiplying it by `1.10` for all employees in the 'sales' department.
Transcribed Image Text:### SQL Update Statements to Increase Salary Given an Employee table with columns for `salary` and `dept`, to raise the salaries of all employees in the sales department by 10%, we could write one of the following SQL statements: 1. **Option A:** ```sql UPDATE salary SET salary = salary*1.10 WHERE dept='sales'; ``` 2. **Option B:** ```sql UPDATE Employee SET salary = 1.10 WHERE dept='sales'; ``` 3. **Option C:** ```sql UPDATE Employee LET salary = salary*1.10 WHERE dept='sales'; ``` 4. **Option D:** ```sql UPDATE Employee SET salary = salary*1.10 WHERE dept='sales'; ``` ### Analysis - **Option A:** Incorrect. Using `UPDATE salary` is not appropriate since `salary` is a column, not a table. - **Option B:** Incorrect. This statement sets the `salary` column to a constant value of `1.10`, which means it won't increase the salary by 10% correctly. - **Option C:** Incorrect. The use of `LET` is syntactically incorrect in the context of an SQL `UPDATE` statement. - **Option D:** Correct. This statement accurately reflects the intention to update the `salary` column by multiplying it by `1.10` for all employees in the 'sales' department.
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