MariaDB See If Table Exists

The MariaDB See If Table Exists statement simply utilizes a CREATE TABLE statement from the MariaDB Server, and data is inserted into the table. And this is what this MariaDB tutorial will discuss. We will discuss and conclude several scenarios to help you better comprehend the subject. Below is a list of every topic we’ll cover.

  • How to see if a table exists in MariaDB?
  • How to test if a table exists in MariaDB?
  • How to use MariaDB SHOW TABLE STATUS statement?
  • How to check the table exists before inserting it into MariaDB?

MariaDB See If Table Exists

Here we will learn and understand how to check if a table exists in the current database of the MariaDB Server by the query, which will be explained with the help of a sample example.

METHOD 1:

In MariaDB, the INFORMATION_SCHEMA.TABLES contain information about non-temporary tables and views from the server. It will not carry information about tables from the INFORMATION SCHEMA database. Here is an example of querying in this table:

EXAMPLE:

SELECT TABLE_SCHEMA, TABLE_NAME,TABLE_TYPE
FROM INFORMATION_SCHEMA.TABLES 
WHERE 
TABLE_SCHEMA LIKE 'Airbnb_db' AND 
TABLE_TYPE LIKE 'BASE TABLE' AND
TABLE_NAME LIKE '%a__e%';

As we see in the above query, the SELECT statement retrieves all records from the TABLE_SCHEMA, TABLE_NAME, and TABLE_TYPE from the INFORMATION_SCHEMA.TABLES table with the WHERE condition. In the WHERE condition, the TABLE_SCHEMA column is used with the LIKE clause to find the current database name as AIRBNB_DB from the MariaDB Server.

Then we used the TABLE_TYPE column with the LIKE clause to find the BASE TABLE record from the MariaDB Server and in the TABLE_NAME column to find table_name whose name starts with the alphabet a and end with the alphabet e in the current database of the MariaDB Server.

MariaDB see if tables exists example
Example of MariaDB INFORMATION_SCHEMA.TABLES statement to see if tables exist

METHOD 2:

In MariaDB, the SHOW TABLES statement is used to list non-temporary tables, sequences, and views in the current database. And we can also use the WHERE condition to narrow it to a given type. We can also use the FULL modifier to return a column that displays a type as BASE TABLE or VIEW in the output result set.

Here is a sample example of the MariaDB SHOW TABLES statement by the following query:

EXAMPLE:

SHOW FULL TABLES
WHERE Table_Type LIKE 'BASE TABLE'
AND Tables_in_AIRBNB_DB LIKE '%e_s%';

In the aforementioned query, we have used the SHOW FULL TABLES statement is used to show full tables from the current database in the result set with the help of the WHERE condition.

In the WHERE condition, the TABLE_TYPE column is used with the LIKE operator to find the BASE TABLE records from the current database. And, in the TABLES_IN_AIRBNB_DB column is used with the LIKE clause to find table names whose names come in between alphabet e and end with the alphabet s in the current database by the query.

MariaDB see if table exists tutorial
Example of MariaDB SHOW FULL TABLES statement to see if a table exists in the current database

We hope that you have understood the subtopic “MariaDB See If Tables Exists”. For your understanding, we have used two methods with sample examples and demonstrated them in deepness.

Read: MariaDB Order By Decreasing

MariaDB Show Table Status

Here we will learn and understand how to use the MariaDB SHOW TABLE STATUS statement in the current database by the query, which will be explained with the help of a sample example.

The MariaDB SHOW TABLES STATUS statement is the same as the SHOW TABLES statement but it provides comprehensive knowledge about the separately non-temporary tables. Here is a sample example of the MariaDB SHOW TABLES STATUS statement by the following query:

EXAMPLE:

SHOW TABLE STATUS
FROM Airbnb_db
WHERE name LIKE 'a%';

In the preceding query, we have used the SHOW TABLE STATUS statement which will have comprehensive knowledge of the tables from the current database as Airbnb_db and used with the WHERE condition.

In the WHERE condition, the NAME column is used with the LIKE clause to find table names starting with the alphabet a in the AIRBNB_DB database.

If the SHOW TABLE STATUS retrieves all the table names from the AIRBNB_DB database only when the WHERE condition gets a TRUE value. But if the WHERE condition gets a FALSE value then the SHOW TABLE STATUS statement will be executed and will retrieve a non-table name with starting alphabet a from the AIRBNB_DB database.

MariaDB test if table exists example
Example of MariaDB Test If Table Exists

We hope that you have understood the subtopic “MariaDB Test If Table Exists” by using the MariaDB SHOW TABLE STATUS statement on the current database by the query. We have used a sample example and presented it in deepness, for better performance.

Read: MariaDB Display List of Databases

MariaDB Test If Table Exists

Here we will learn and understand how to test if a table exists in the current database by the query, which will be explained with the help of a sample example.

We can use the MariaDB Client programming to test if a table exists in the current database by the following query:

EXAMPLE:

Enter Password: ***********

USE AIRBNB_DB

SHOW TABLES;

In the example query explanation:

  • First, we need to open the MySQL Client (MariaDB 10.7 x64) programming language.
  • Second, under the ENTER PASSWORD tab just right your user’s password and it will automatically right your password in * sign. And my password is “G@meison00″. Then click the ENTER button.
  • Third, use the USE keyword with the current database_name so that we can get entered inside the current database by the MariaDB Server.
  • In the end, we will use the SHOW TABLES statement to show the list of all tables from the current database by the query.
MariaDB test if table exists tutorial
Example of MariaDB SHOW TABLES statement to test if table exists in the current database

We hope that you have understood the subtopic “MariaDB Test If Table Exists” by using the MariaDB SHOW TABLES statement from the current database by the query. We have used a sample example and defined it in deepness, for better acquaintance.

Read: MariaDB Show Column Data Type

MariaDB Check If Table Exists Before Insert

In this MariaDB subtopic section, we will learn and understand how to check if table exists in the MariaDB before inserting a new record into the table. And it is done by the following query with a sample example.

EXAMPLE:

CREATE TABLE IF NOT EXISTS USA_STATES(
STATE_ID INT AUTO_INCREMENT PRIMARY KEY, 
STATE_NAME VARCHAR(50),
FULL_NAME VARCHAR(50));

DESC USA_STATES;

In this query, we have used the CREATE TABLE statement to create a table called USA_STATES and also added the IF NOT EXISTS clause in the starting which means that it will check and confirm whether table_name already exists in the current database. In the creation of the new table_name, we have created new columns as STATE_ID, STATE_NAME, and FULL_NAME with datatype as INT, VARCHAR.

Once we execute the first query, it will produce a warning sign saying “USA_STATES already exists” in the current database. If we want to describe it, we will use the MariaDB DESC statement for the description of the current table_name from the current database. As the DESC statement will describe the existing table_name in its detail.

MariaDB check if table exists before insert example
Example of MariaDB Check If Table Exists Before Insert

We hope that you have understood the subtopic “MariaDB Check If Table Exists Before Insert” by using the MariaDB CREATE TABLE IF NOT EXISTS statement on the creation of a new table in the current database by the query. For a better explanation, we have used a sample example and defined it in depth.

You may also like to read the following MariaDB tutorials.

Here in this tutorial, we understood the use of MariaDB See If Table Exists statements after reading this lesson. Moreover, we have also discussed a few instances to help you comprehend the concept. Below is a list of all the topics we’ve covered.

  • How to see if a table exists in MariaDB?
  • How to test if a table exists in MariaDB?
  • How to use MariaDB SHOW TABLE STATUS statement?
  • How to check table if exists before inserting in MariaDB?