To add a new column "description" of type varchar(255) and add a not null constraint to the building table, you can use the following SQL query:

```sql
ALTER TABLE building
ADD COLUMN description VARCHAR(255) NOT NULL;
```

Here's the step by step breakdown:

1. `ALTER TABLE building`: This statement is used to add, delete/drop or modify columns in an existing table. It is also used to add and drop various constraints on an existing table. In this case, we're altering the table named "building".

2. `ADD COLUMN description VARCHAR(255)`: This part of the query is used to add a new column to the table. We're adding a column named "description" of type VARCHAR with a maximum length of 255 characters.

3. `NOT NULL`: This is a constraint that ensures that the new column cannot have a NULL value. In other words, every row in the table must have a value for the "description" column.

Question

To add a new column "description" of type varchar(255) and add a not null constraint to the building table, you can use the following SQL query:

```sql
ALTER TABLE building
ADD COLUMN description VARCHAR(255) NOT NULL;
```

Here's the step by step breakdown:

1. `ALTER TABLE building`: This statement is used to add, delete/drop or modify columns in an existing table. It is also used to add and drop various constraints on an existing table. In this case, we're altering the table named "building".

2. `ADD COLUMN description VARCHAR(255)`: This part of the query is used to add a new column to the table. We're adding a column named "description" of type VARCHAR with a maximum length of 255 characters.

3. `NOT NULL`: This is a constraint that ensures that the new column cannot have a NULL value. In other words, every row in the table must have a value for the "description" column.

Knowee AI · Accepted Answer

To add a new column "description" of type varchar(255) and add a not null constraint to the building table, you can use the following SQL query:

```sql
ALTER TABLE building
ADD COLUMN description VARCHAR(255) NOT NULL;
```

Here's the step by step breakdown:

1. `ALTER TABLE building`: This statement is used to add, delete/drop or modify columns in an existing table. It is also used to add and drop various constraints on an existing table. In this case, we're altering the table named "building".

2. `ADD COLUMN description VARCHAR(255)`: This part of the query is used to add a new column to the table. We're adding a column named "description" of type VARCHAR with a maximum length of 255 characters.

3. `NOT NULL`: This is a constraint that ensures that the new column cannot have a NULL value. In other words, every row in the table must have a value for the "description" column.

Alter building(Add Column)Write a query to add new column "description" of type varchar(255) add not null constraint to building table.

Question

Alter building(Add Column)

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