Error 1046 No database Selected, how to resolve?

The 1046 error occurs if you forget to select any database before creating a table. Let us see how and why this error occurs. We will try to create a table without selecting a database −

mysql> CREATE table MyTable1
   -> (
   -> id int
   -> );
ERROR 1046 (3D000): No database selected
Or
mysql> INSERT into sample values(1);
ERROR 1046 (3D000): No database selected

Look at the output above, we are getting the same 1046 error: "No database selected"

Now, we can resolve this error after selecting any database with the help of USE command −

mysql> USE business;
Database changed

Above, I have included the database with the name ?business?. After that, we can create the same table (which we tried creating above) under the database, "business" −

mysql> CREATE table MyTable1
   -> (
   -> id int
   -> );
Query OK, 0 rows affected (0.49 sec)

We can check whether the table is present or not in the "business" database. The query is as follows −

mysql> SHOW tables like '%MyTable1%';

The following is the output

+---------------------------------+
| Tables_in_business (%MyTable1%) |
+---------------------------------+
| mytable1                        |
+---------------------------------+
1 row in set (0.05 sec)