SQL Best Practices
Structured Query Language (SQL) is a simple, yet powerful database programming and administration language used to manipulate data stored in a relational database or relational database management...
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What is a Relational Database Management System
If you are new to database administration or database development, you have no doubt heard the phrase “relational database management system” being tossed around. As database programmers or those that...
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How to Prevent SQL Injections
An SQL injection is an attack on a database server where a malicious actor enters – or injects – some nefarious input in a form, other than the expected input. The attack can be used to gain access to...
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What is PostgreSQL?
PostgreSQL is one of the world’s most widely used database systems in the world, offering support for not only structured query language (SQL), but JSON as well, making it a great choice for...
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How to Use SQL WHERE Clause
When querying a relational database, database programmers and administrators will often need to filter the records returned or extract specific records that meet a given criteria. In this database...
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SQL Data Types
In SQL, data types help to define the type of value that can be stored in a database cell, or, more specifically, in a column. There are many kinds of data types in SQL and in this database...
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How to Use Databases With Python
Python allows developers to interact with various relational databases (such as Oracle, SQLite, and MySQL) and relational database systems (RDBMS) through several different libraries, which must...
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Working with SQL AND, OR, and NOT Operators
In a previous tutorial, we learned how to work with the WHERE clause in SQL, which database developers can use when they wish to retrieve a group of records that meet a certain criteria or condition....
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Working with NULL Values in SQL
In SQL and relational databases, NULL values are an important part of managing data and information stored in SQL tables. A NULL value is used as a placeholder for missing values or values that are...
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SQL SORT BY Statement
In relational databases, the SQL ORDER BY statement is a powerful tool for sorting data in a table. The statement is used to arrange queried data into rows in a specific order, based upon one or more...
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