delete all students who have taken a course in the watson building mysql

How to delete all tuples in a course in SQL?

§  Solution used in SQL: 1.   First, compute avg(salary) and find all tuples to delete 2.   Next, delete all tuples found above (without recomputing avgor retesting the tuples) 21 Insertion §  Add a new tuple to course insert into course values (’CS-437’, ’Database Systems’, ’Comp. Sci.’, 4); §  or equivalently

How to filter out students with multiple courses subscribed to?

Firstly, get all the students who are either enrolled IN (..) course no (1, 3). Then, you can use HAVING clause to filter out the students having atleast two unique courses subscribed to (which would be 1 and 3 in this case):

How to delete a single record or multiple records in MySQL?

We can delete a single record or multiple records depending on the condition we specify in the WHERE clause. DELETE FROM table_name WHERE some_condition; table_name: name of the table some_condition: condition to choose particular record. Note: We can delete single as well as multiple records depending on the condition we provide in WHERE clause.

How to delete a record from a table in SQL?

The DELETE Statement in SQL is used to delete existing records from a table. We can delete a single record or multiple records depending on the condition we specify in the WHERE clause. DELETE FROM table_name WHERE some_condition; table_name: name of the table some_condition: condition to choose particular record.

What is the command for deleting all the records present from the table in MySQL?

If you want to delete a record from any MySQL table, then you can use the SQL command DELETE FROM. You can use this command at the mysql> prompt as well as in any script like PHP.

Which command deletes all records from a student table?

SQL Truncate Command. SQL Truncate is a data definition language (DDL) command. It removes all rows in a table.

How do I delete data in MySQL workbench?

MySQL DELETE StatementDELETE FROM table_name WHERE condition;Example. DELETE FROM Customers WHERE CustomerName='Alfreds Futterkiste';DELETE FROM table_name;Example. DELETE FROM Customers;

What would this SQL command delete student do?

SQL Delete With Subquery DELETE FROM student WHERE student_id NOT IN ( SELECT student_subject. student_id FROM student_subject ); This query first looks up student_id values in the student_subject table. Then, it deletes records from the student table where the student_id is not in that list.

Which command is used to delete all records?

We can also use the TRUNCATE command to delete all the records from a table.

How do I remove all records from a table in SQL?

To delete every row in a table:Use the DELETE statement without specifying a WHERE clause. With segmented table spaces, deleting all rows of a table is very fast. ... Use the TRUNCATE statement. The TRUNCATE statement can provide the following advantages over a DELETE statement: ... Use the DROP TABLE statement.

How do I delete a batch file in MySQL?

We can use DELETE statement along with a WHERE clause, which identifies those multiple rows, to delete multiple rows from MySQL table.

How do you clear a table in MySQL?

To permanently remove a table, enter the following statement within the MySQL shell: DROP TABLE table1; Replace table1 with the name of the table you want to delete. The output confirms that the table has been removed.

How do I delete a database in MySQL?

Deleting a MySQL or MariaDB database Use the command 'SHOW DATABASES;' in the mysql-console like in the example above. Now copy the name of the database you want to delete. To do delete a database you need the command 'DROP DATABASE'. The syntax is similar to creating a database.

Which of the following SQL query is correct to delete the records from table student?

The SQL DELETE Query is used to delete the existing records from a table. You can use the WHERE clause with a DELETE query to delete the selected rows, otherwise all the records would be deleted.

How do you use JOIN IN delete query in mysql?

Similarly, we can also use the LEFT JOIN clause with the DELETE keyword for deleting rows from the left(first) table that does not have matching rows from a right(second) table....DELETE JOIN with LEFT JOINDELETE Table1 FROM Table1.LEFT JOIN Table2 ON Table1. key = Table2. key.WHERE Table2. key IS NULL;

Which SQL statement is used to delete the table?

The DROP TABLE statement is used to drop an existing table in a database.