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If the table name we specified doesnвЂ™t exist, an empty array will be returned:

If the employeesвЂ™ table exists, it will return its name as follows: We can also check if the table we want to access exists or not by executing the following query: cursorObj.execute('SELECT name from sqlite_master WHERE type = 'table' AND name = 'employees'') Similarly, to check if the table exists when deleting, we use вЂњ if existsвЂќ with the DROP TABLE statement as follows: drop table if exists table_nameДЇor example, cursorObj.execute('drop table if exists projects') To check if the table doesnвЂ™t already exist, we use вЂњ if not existsвЂќ with the CREATE TABLE statement as follows: create table if not exists table_name (column1, column2, вЂ¦, columnN)Д¬ursorObj.execute('create table if not exists projects(id integer, name text)') Similarly, when removing/ deleting a table, the table should exist. When creating a table, we should make sure that the table is not already existed. In the above SELECT statement, instead of using the asterisk (*), we specified the id and name attributes. Now, to fetch id and names of those who have a salary greater than 800: import sqlite3Д¬ursorObj.execute('SELECT id, name FROM employees WHERE salary > 800.0') You can use the insert statement to populate the data, or you can enter them manually in the DB browser program. For this, letвЂ™s populate our table with more rows, then execute our query. For example, we want to fetch the ids and names of those employees whose salary is greater than 800. If you want to fetch specific data from the database, you can use the WHERE clause. You can also use the fetchall() in one line as follows:

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The above code will print out the records in our database as follows:

After that, we will loop through the variable and print all values.Д¬ursorObj.execute('SELECT * FROM employees') To fetch the data from a database, we will execute the SELECT statement and then will use the fetchall() method of the cursor object to store the values into a variable. In the above code, we have defined two methods, the first one establishes a connection and the second method creates a cursor object to execute the create table statement. The code will be like this: import sqlite3Д¬ursorObj.execute('CREATE TABLE employees(id integer PRIMARY KEY, name text, salary real, department text, position text, hireDate text)') LetвЂ™s create employees with the following attributes: employees (id, name, salary, department, position, hireDate) Using the cursor object, call the execute method with create table query as the parameter.From the connection object, create a cursor object.To create a table in SQLite3, you can use the Create Table query in the execute() method.

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Closing a connection is optional, but it is a good programming practice, so you free the memory from any unused resources. If there are no errors, the connection will be established and will display a message as follows.ДЄfter that, we have closed our connection in the finally block. Then we have except block, which in case of any exceptions prints the error message. Inside this function, we have a try block where the connect() function is returning a connection object after establishing the connection. Print('Connection is established: Database is created in memory')ДЇirst, we import the sqlite3 module, then we define a function sql_connection. This database is called in-memory database.Д¬onsider the code below in which we have created a database with a try, except and finally blocks to handle any exceptions: import sqlite3 This database file is created on disk we can also create a database in RAM by using :memory: with the connect function. When you create a connection with SQLite, that will create a database file automatically if it doesnвЂ™t already exist.

Sqlite count