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';
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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
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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