SQL – Page 10 – CodeRavo

Retrieving the Last Record from a Database Table using SQL

In this tutorial, we will explore how to retrieve the last record from a database table … Retrieving the Last Record from a Database Table using SQLRead more

database, fetch-first-clause, last-record, limit-clause, max, SQL, subquery, top-clause

Removing Duplicate Rows in SQL

Removing Duplicate Rows in SQL Duplicate data is a common problem in database management. It can … Removing Duplicate Rows in SQLRead more

cte, data cleaning, data integrity, Database Management, distinct, duplicate-rows, group by, row-number, SQL

Calculating the First Day of a Month in SQL

Calculating the first day of a month is a common requirement in various data analysis and … Calculating the First Day of a Month in SQLRead more

date-functions, dateadd, datediff, datefromparts, datetrunc, eomonth, first-day-of-month, SQL

Querying Non-Existent Records Across Tables Using SQL

Introduction In relational databases, a common scenario is identifying records present in one table but absent … Querying Non-Existent Records Across Tables Using SQLRead more

LEFT JOIN, not-exists, not-in, query optimization, relational databases, set-operations, SQL

Using Conditional Logic in SQL SELECT Statements for Dynamic Data Output

Introduction When working with databases, particularly when querying data using SQL, you may encounter scenarios where … Using Conditional Logic in SQL SELECT Statements for Dynamic Data OutputRead more

CASE statement, conditional logic, dynamic-data-output, if-function, null-handling, SELECT statement, SQL

Combining Results with UNION and UNION ALL

Combining Results with UNION and UNION ALL In SQL, you often need to combine the results … Combining Results with UNION and UNION ALLRead more

combine-results, data types, database, duplicate-removal, performance, query, SELECT statement, SQL, union, union-all

Joining Multiple Tables for Data Enrichment

Joining Multiple Tables for Data Enrichment In relational databases, data is often spread across multiple tables … Joining Multiple Tables for Data EnrichmentRead more

data-enrichment, database-join, database-queries, Inner Join, join(), multiple-tables, relational-database, SQL, sql-tutorial

Renaming Columns in SQL Server

SQL Server provides a mechanism to rename columns within a table, allowing you to modify your … Renaming Columns in SQL ServerRead more

database administration, Database Management, database schema, rename-column, sp-rename, SQL, SQL Server, T-SQL, transact-sql

Using Multiple Conditions with CASE Statements in SQL

The CASE statement is a powerful tool in SQL that allows you to perform conditional logic … Using Multiple Conditions with CASE Statements in SQLRead more

best practices, CASE statement, conditional logic, multiple-conditions, nested-case-statements, SQL

Renaming a MySQL Database

Renaming a MySQL database can be a complex task, especially when dealing with large databases or … Renaming a MySQL DatabaseRead more

database-rename, InnoDB, myisam, MySQL, mysqldump, phpmyadmin, rename-table, SQL