MySQL − Show Tables
Table of content
- MySQL Show Tables Statement
- SHOW TABLES with FULL modifier
- SHOW TABLES in different Database
- SHOW TABLES using Pattern Matching
- Showing tables Using a Client Program
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MySQL Show Tables Statement
In MySQL, we use the SHOW TABLES command to retrieve the names of tables that are present in a specific database. This command is useful in various situations, such as:
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When we want to view names of tables present in a database to verify if a specific table exists or not.
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When we want to display additional information about each table present in a database, we use the SHOW TABLES command with the MySQL FULL modifier.
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Additionally, we can use the SHOW TABLES command with WILDCARDS to filter and display only the tables that match a specific pattern.
Syntax
Following is the syntax of MySQL SHOW TABLES command−
SHOW TABLES;
Before proceeding with the examples, assume that the following tables exist in two databases, testdb1 and testdb2:
Databases | testdb1 | testdb2 |
---|---|---|
Tables | employee_remarks | employee_age |
employee_salary | students_marks | |
students_attendance | ||
students_fees | ||
students_remarks |
Example
First of all, we are changing the database to testdb1 to perform the SHOW TABLES operation on it.
mysql> USE testdb1; Database changed
Now, execute the following query to list down all the tables from testdb1 database.
SHOW TABLES;
Output
Following are the tables that are present in the testdb1 database −
Tables_in_testdb1 |
---|
employee_remarks |
employee_salary |
students_attendance |
students_fees |
students_remarks |
SHOW TABLES with FULL modifier
In MySQL, we use the optional FULL modifier along with the SHOW TABLES command to display a second output column that contains additional information about the tables present in a database, such as their types: BASE TABLE for a table, VIEW for a view, or SYSTEM VIEW for an INFORMATION_SCHEMA table.
Example
In the following query, we are using the FULL modifier along with the SHOW TABLES command to list the tables and their types in the testdb1 database.
SHOW FULL TABLES;
Output
Following is the output of the above query −
Tables_in_testdb1 | Table_type |
---|---|
employee_remarks | BASE TABLE |
employee_salary | BASE TABLE |
students_attendance | BASE TABLE |
students_fees | BASE TABLE |
students_remarks | BASE TABLE |
SHOW TABLES in different Database
In MySQL, we can retrieve the list of tables present in another database. To do so, we need to use the IN operator or the FROM clause in conjunction with the SHOW TABLES statement.
Example
In the following query, we are fetching the list of tables that exist in another database testdb2, using the SHOW TABLES command with IN operator.
SHOW TABLES IN testdb2;
Output
Following are the names of the tables that are present in testdb2 database −
Tables_in_testdb2 |
---|
employee_age |
students_marks |
Example
We can also perform the above operation using the SHOW TABLES command with FROM clause.
SHOW TABLES FROM testdb2;
Output
As we can observe, both outputs are the same.
Tables_in_testdb2 |
---|
employee_age |
students_marks |
SHOW TABLES using Pattern Matching
In some scenarios where there are large amount of tables present in a database, and we want to retrieve only specific tables, we use the LIKE operator with WILDCARD characters such as ”%”. These wildcards will filter and display only the tables that match a specific pattern.”
Example
In the following query, we are using the LIKE operator with SHOW TABLES command to select all the tables (in testdb1 database) where the name starts with “stud”.
SHOW TABLES IN testdb1 LIKE "stud%";
Output
Following are the tables present in testdb1 database whose name starts with “stud” −
Tables_in_testdb1 (stud%) |
---|
students_attendance |
students_fees |
students_remarks |
Example
Here, we are trying to retrieve the tables from testdb2 database where the name starts with “stud” −
SHOW TABLES IN testdb2 LIKE "stud%";
Output
This will produce following result −
Tables_in_testdb2 (stud%) |
---|
students_marks |
Example
We are using the SHOW TABLES along with WHERE clause to check if there is a table named “employee_remarks” in testdb1 database −
SHOW TABLES FROM testdb1 WHERE Tables_in_testdb1 = "employee_remarks";
Output
This will produce following result −
Tables_in_testdb1 |
---|
employee_remarks |
Showing tables Using a Client Program
Besides showing the list of tables present in a MySQL database with a MySQL query, we can also use a client program to perform the SHOW TABLES operation.
Syntax
Following are the syntaxes to Show list of tables in MySQL Database in various programming languages −
To show the list of tables in MySQL Database through a PHP program, we need to execute SHOW TABLES statement using the mysqli function query() as −
$sql = "SHOW TABLES FROM DATABASE"; $mysqli->query($sql);
To show the list of tables in MySQL Database through a Node.js program, we need to execute SHOW TABLES statement using the query() function of the mysql2 library as −
sql= "SHOW TABLES FROM DATABASE"; con.query(sql);
To show the list of tables in MySQL Database through a Java program, we need to execute SHOW TABLES statement using the JDBC function executeUpdate() as −
String sql = "SHOW TABLES FROM DATABASE"; statement.executeQuery(sql);
To show the list of tables in MySQL Database through a Java program, we need to execute SHOW TABLES statement using the execute() function of the MySQL Connector/Python as −
show_table_query = "SHOW TABLES FROM DATABASE" cursorObj.execute(show_table_query);
Example
Following are the programs −
$dbhost = ''localhost''; $dbuser = ''root''; $dbpass = ''password''; $dbname = ''TUTORIALS''; $mysqli = new mysqli($dbhost, $dbuser, $dbpass, $dbname); if ($mysqli->connect_errno) { printf("Connect failed: %s
", $mysqli->connect_error); exit(); } // printf(''Connected successfully.
''); $sql = "SHOW TABLES FROM TUTORIALS"; if ($result = $mysqli->query($sql)) { printf("Show table executed successfully.
"); while ($row = mysqli_fetch_array($result)) { print_r($row); } } if ($mysqli->errno) { printf("Could not show table: %s
", $mysqli->error); } $mysqli->close();
Output
The output obtained is as follows −
Show table executed successfully. Array ( [0] => articles [Tables_in_tutorials] => articles ) Array ( [0] => courses [Tables_in_tutorials] => courses ) Array ( [0] => customers [Tables_in_tutorials] => customers ) Array ( [0] => customerss [Tables_in_tutorials] => customerss ) Array ( [0] => demo_table [Tables_in_tutorials] => demo_table ) Array ( [0] => employee [Tables_in_tutorials] => employee ) Array ( [0] => films [Tables_in_tutorials] => films ) Array ( [0] => films_watched [Tables_in_tutorials] => films_watched ) Array ( [0] => myplayers [Tables_in_tutorials] => myplayers ) Array ( [0] => new_tutorial_tbl [Tables_in_tutorials] => new_tutorial_tbl ) Array ( [0] => orders [Tables_in_tutorials] => orders ) Array ( [0] => persons [Tables_in_tutorials] => persons ) Array ( [0] => products [Tables_in_tutorials] => products ) Array ( [0] => sales [Tables_in_tutorials] => sales ) Array ( [0] => students [Tables_in_tutorials] => students )
var mysql = require(''mysql2''); var con = mysql.createConnection({ host: "localhost", user: "root", password: "Nr5a0204@123" }); //Connecting to MySQL con.connect(function (err) { if (err) throw err; console.log("Connected!"); console.log("--------------------------"); sql = "CREATE DATABASE TUTORIALS;" con.query(sql); sql = "USE TUTORIALS;" con.query(sql); sql = "CREATE TABLE CUSTOMERS (ID INT NOT NULL, NAME VARCHAR(20) NOT NULL);" con.query(sql); sql = "CREATE TABLE ORDERS (OID INT NOT NULL, CUSTOMER_ID INT);" con.query(sql); sql = "SHOW TABLES;" con.query(sql, function(err, result){ if (err) throw err console.log(result); }); });
Output
The output produced is as follows −
Connected! -------------------------- [ { Tables_in_tutorials: ''customers'' }, { Tables_in_tutorials: ''orders'' } ]
import java.sql.*; public class JDBCconnection { public static void main(String[] args){ String url = "jdbc:mysql://localhost:3306/TUTORIALS"; String username = "root"; String password = "password"; try{ Class.forName("com.mysql.cj.jdbc.Driver"); Connection connection = DriverManager.getConnection(url, username, password); Statement statement = connection.createStatement(); System.out.println("Connected successfully...!"); //show table statement...! String sql = "SHOW TABLES FROM TUTORIALS"; ResultSet resultSet = statement.executeQuery(sql); System.out.println("Tables in the current database: "); while(resultSet.next()) { System.out.print(resultSet.getString(1)); System.out.println(); } connection.close(); } catch(Exception e){ System.out.println(e); } } }
Output
The output obtained is as shown below −
Connected successfully...! Tables in the current database: articles blackpink blog courses customer customers data
import mysql.connector #establishing the connection connection = mysql.connector.connect( host=''localhost'', user=''root'', password=''password'', database=''tut'' ) #Creating a cursor object cursorObj = connection.cursor() cursorObj.execute("SHOW TABLES") tables = cursorObj.fetchall() print("Tables in the database are:") for table in tables: print(table[0]) cursorObj.close() connection.close()
Output
Following is the output of the above code −
Tables in the database are: books novel novels tutorials_tbl
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