Imagine you want to find a piece of information that is within a large database. To get this information out of the database the computer will look through every row until it finds it. If the data you are looking for is towards the very end, this query would take a long time to run...
In SQL tables, a record is defined as a data set of columns with a unique identifier associated with every column. The data set may contain values of varying data types. A record can also be considered as a row in a normal table way. Similar to a normal table, every SQL table can c...
Backup and Recovery are essential parts of and DBA’s job. After all, if you lose your data you lose your job so you need a great backup strategy. In this session we will cover Recovery Models, Backup Types, Backup Strategy, Restores, RTO, RPO, and understanding how your Transaction Log...
We can use the TINYINT data type for MySQL to store Boolean values. In MySQL, zero is considered false, and any non-zero value is true. Hence, we can use 0 and 1 to represent false and true. You can use the BOOLEAN type in MySQL, simply a synonym for TINYINT. An example is sho...
Once the adapter is installed, you can create an engine for your PostgreSQL database: from sqlalchemy import create_engine engine = create_engine('postgresql+psycopg2://USERNAME:PASSWORD@HOST/DB_NAME') Oracle To interact with an Oracle database using Python, we can utilize the cx_Oracle librar...
Using params with Different Data Types Pandasread_sqlfunction allows you to pass parameters in different data types such as lists, tuples, and dictionaries. Let’s examine how to use these different data types with theparamsparameter: List: Ideal for positional parameters in your SQL query. ...
[title size=”2″]SQLGeeks Meet-Up, Gurugram – May 21, 2016, Saturday at Microsoft[/title] [separator top=”20″ style=”single”]Sponsored By: [separator top=”20″] [separator top=”20″ style=”single”] [separator top=”10″]Event Details: ...
If you are running this for the first time, the tool will ask you to provide a connection to a SQL Server instance and a database were relevant tables can be created. You will get a dialog box something like this: Now is the time to create a blank database. In case you alr...
Ans: An SQL Join is used to combine data from two or more tables, based on a common field between them. For example, consider the following two tables. Student Table EnrollNo StudentName Address 1000 geek1 geeksquiz1 1001 geek2 geeksquiz2 ...
Resources Difference between Primary Key and Foreign Key - GeeksforGeeks SQL Joins - W3Schools Practice SQL Queries on SQLBolt