Deleting multiple tables in MySQL
This article aims to understand how to delete multiple tables in MySQL.
Most businesses and organizations that use MySQL to visualize and analyze data have multiple tables to work with. Sometimes, these tables become redundant. In such cases, you need to get rid of these tables to make room for newer tables or records.
Furthermore, it becomes crucial to understand how to get rid of multiple tables at once to avoid messy queries that run for hours individually. Removing multiple queries at once also helps improve the readability of the entire code base.
Let us try to understand this a little deeper.
However, before we get started, we'll create two virtual tables to work with. Here, we create a table student_dates
and a few rows.
-- create the table student_dates
CREATE TABLE student_dates(
stu_id int,
stu_firstName varchar(255) DEFAULT NULL,
stu_date date,
primary key(stu_id)
);
Similarly, we can create a table student_details
and some defined rows using the following query.
-- create the table student_details
CREATE TABLE student_details(
stu_id int,
stu_firstName varchar(255) DEFAULT NULL,
stu_lastName varchar(255) DEFAULT NULL,
primary key(stu_id)
);
Use INSERT
the statement to insert entries into the MySQL table
The previous query creates a student_dates
table named . INSERT
With the help of add statement, let us add data for some students. The operation can be performed as follows.
-- insert rows to the table student_dates
INSERT INTO student_dates(stu_firstName,stu_date)
VALUES("Preet",STR_TO_DATE('24-May-2005', '%d-%M-%Y')),
("Dhruv",STR_TO_DATE('14-June-2001', '%d-%M-%Y')),
("Mathew",STR_TO_DATE('13-December-2020', '%d-%M-%Y')),
("Jeet",STR_TO_DATE('14-May-2003', '%d-%M-%Y')),
("Steyn",STR_TO_DATE('19-July-2002', '%d-%M-%Y'));
This code will student_dates
enter the student data in the table . We can visualize this table using the following command.
SELECT * from student_dates;
The code block will generate the following output.
stu_id stu_firstName stu_date
1 Preet 2005-05-24
2 Dhruv 2001-06-14
3 Mathew 2020-12-13
4 Jeet 2003-05-14
5 Steyn 2002-07-19
Similarly, let us student_details
insert values into the table. We can do that using the following query.
-- insert rows to the table student_details
INSERT INTO student_details(stu_id,stu_firstName,stu_lastName)
VALUES(1,"Preet","Sanghavi"),
(2,"Rich","John"),
(3,"Veron","Brow"),
(4,"Geo","Jos"),
(5,"Hash","Shah"),
(6,"Sachin","Parker"),
(7,"David","Miller");
student_details
The table can be visualized with the help of the following query.
SELECT * from student_details;
Output:
stu_id stu_firstName stu_lastName
1 Preet Sanghavi
2 Rich John
3 Veron Brow
4 Geo Jos
5 Hash Shah
6 Sachin Parker
7 David Miller
Use DROP TABLE
the statement to delete multiple tables in MySQL
To delete a table in MySQL, you can use DROP TABLE
the statement. The syntax of the statement is as follows.
DROP TABLE name_of_the_table;
A table named name_of_the_table
will be placed in the query.
Now let us aim to delete multiple tables i.e. student_dates
and student_details
. We can do that using the following query.
DROP TABLE IF EXISTS student_dates, student_details;
The query eliminates the tables student_dates
and student_details
. These names can now be used to name the table with the newer records.
Therefore, with the help DROP TABLE
of statement, we can delete multiple tables quickly and efficiently in MySQL with high code readability.
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