When working with databases that store date ranges, it’s common to need to query data based … Querying Data within a Date RangeRead more
SQL
Working with Databases in MySQL: Selecting and Creating Databases
Introduction When working with database systems like MySQL, it’s crucial to understand how to tell the … Working with Databases in MySQL: Selecting and Creating DatabasesRead more
Working with Apostrophes in SQL Strings
When working with strings in SQL, it’s common to encounter values that contain apostrophes (single quotes). … Working with Apostrophes in SQL StringsRead more
Emulating a Full Outer Join in MySQL
In SQL, a full outer join is used to combine rows from two or more tables … Emulating a Full Outer Join in MySQLRead more
Conditional Filtering in SQL WHERE Clauses
Conditional Filtering in SQL WHERE Clauses SQL is a powerful language for querying and manipulating data. … Conditional Filtering in SQL WHERE ClausesRead more
Assigning Values from SQL Queries to Variables
Assigning Values from SQL Queries to Variables In SQL Server (and many other database systems), it’s … Assigning Values from SQL Queries to VariablesRead more
Handling NULL Values in SQL Queries
When working with databases, it’s common to encounter NULL values, which represent missing or unknown data. … Handling NULL Values in SQL QueriesRead more
Formatting Numeric Output in SQL
Controlling Decimal Precision in SQL When working with numeric data in SQL, it’s often necessary to … Formatting Numeric Output in SQLRead more
String to Integer Conversion in SQL
Introduction SQL databases often require data to be in specific types. A common scenario is needing … String to Integer Conversion in SQLRead more
Discovering Your PostgreSQL Version
Discovering Your PostgreSQL Version PostgreSQL is a powerful, open-source object-relational database system. Knowing the version of … Discovering Your PostgreSQL VersionRead more