TableName: student

Table Info:
ID: INT, Primary Key, Unique_NotNull
Full_Name: VARCHAR(50), NotNull
Birth_Date: DATE, Nullable
Gender: ENUM('Male', 'Female'), Nullable
Address: VARCHAR(255), Nullable
Mark: INT, Positive, Nullable

I need to complete the SELECT statement that satisfies the following condition:
* Returns all columns of the students whose names are either 'Jhon' or start with 'Steph'

Please write the correct statement.
user
SELECT * FROM student WHERE Full_Name = 'Jhon' OR Full_Name LIKE 'Steph%';
assistant
Please explain the differences between UNION, UNION ALL, INTERSECT, and MINUS in SQL.
user
Sure. In SQL, the UNION, UNION ALL, INTERSECT, and MINUS (also known as EXCEPT in some SQL dialects) operators are used to combine or compare the results of two or more SELECT statements. Here’s a brief explanation of each:

1. **UNION**:
   - Combines the results of two or more SELECT statements into a single result set.
   - Removes duplicate rows from the final result.
   - The number and the order of columns in the SELECT statements must match, and the data types must be compatible.

   Example:
   ```sql
   SELECT column1 FROM table1
   UNION
   SELECT column1 FROM table2;
   ```

2. **UNION ALL**:
   - Combines the results of two or more SELECT statements into a single result set.
   - Includes all duplicate rows in the final result.
   - The number and the order of columns in the SELECT statements must match, and the data types must be compatible.

   Example:
   ```sql
   SELECT column1 FROM table1
   UNION ALL
   SELECT column1 FROM table2;
   ```

3. **INTERSECT**:
   - Returns only the rows that are common to both SELECT statements.
   - Removes duplicate rows from the final result.
   - The number and the order of columns in the SELECT statements must match, and the data types must be compatible.

   Example:
   ```sql
   SELECT column1 FROM table1
   INTERSECT
   SELECT column1 FROM table2;
   ```

4. **MINUS (EXCEPT)**:
   - Returns only the rows from the first SELECT statement that are not present in the second SELECT statement.
   - Removes duplicate rows from the final result.
   - The number and the order of columns in the SELECT statements must match, and the data types must be compatible.

   Example:
   ```sql
   SELECT column1 FROM table1
   MINUS
   SELECT column1 FROM table2;
   ```

   Note: In some SQL dialects, `MINUS` is replaced by `EXCEPT`.

These operators are useful for combining and comparing data from different tables or queries in a single SQL statement.
assistant
Can you provide examples for INTERSECT and MINUS (EXCEPT)?
user
Certainly! Here are examples for both `INTERSECT` and `MINUS` (or `EXCEPT`):

### INTERSECT Example

Suppose you have two tables, `table1` and `table2`, with the following data:

**table1:**
| column1 |
|---------|
| A       |
| B       |
| C       |
| D       |

**table2:**
| column1 |
|---------|
| B       |
| C       |
| E       |

To find the common rows between `table1` and `table2` using `INTERSECT`:

```sql
SELECT column1 FROM table1
INTERSECT
SELECT column1 FROM table2;
```

The result will be:

| column1 |
|---------|
| B       |
| C       |

### MINUS (EXCEPT) Example

Using the same tables `table1` and `table2`:

To find the rows in `table1` that are not in `table2` using `MINUS` (or `EXCEPT`):

```sql
SELECT column1 FROM table1
MINUS
SELECT column1 FROM table2;
```

The result will be:

| column1 |
|---------|
| A       |
| D       |

### Note on `EXCEPT`

In some SQL dialects, such as SQL Server, PostgreSQL, and SQLite, `MINUS` is replaced by `EXCEPT`. So, the same query in these databases would be:

```sql
SELECT column1 FROM table1
EXCEPT
SELECT column1 FROM table2;
```

The result remains the same:

| column1 |
|---------|
| A       |
| D       |

These examples should help you understand how `INTERSECT` and `MINUS` (or `EXCEPT`) work in SQL.
assistant