Posted inSQL SQL Server

SQL TOP

The SQL TOP clause used to limit the number of rows returned by a query. It is often used when you want to retrieve a specific number of rows from a table that meet certain criteria, or when you want to retrieve the first N rows of a result set. SQL TOP…
Posted inMY SQL SQL

SQL HAVING COUNT

In SQL, the HAVING clause is used in combination with the COUNT function to filter the results of a query based on the count of rows returned by a particular condition. This clause is typically used in conjunction with the GROUP BY clause to aggregate data and then filter the aggregated results. Here’s an…
Posted inMY SQL Oracle PL/SQL SQL

SQL remove duplicates

Removing duplicates from a SQL database is a common task that can help improve data quality and query performance. Duplicates occur when there are multiple rows in a table with identical values in one or more columns. You can eliminate these duplicates using various SQL techniques and clauses. In this…
Posted inSQL MY SQL Oracle PL/SQL

SQL MERGE

The SQL MERGE statement stands out as a versatile tool for consolidating data from multiple sources and maintaining data integrity. It serves as a powerful alternative to the more traditional approach of using individual INSERT, UPDATE, and DELETE statements to manage data changes. The MERGE statement’s ability to handle these operations within a single statement offers…
Posted inMY SQL Oracle PL/SQL SQL

SQL TCL statements

Transaction Control Language (TCL) in SQL is a subset of SQL commands used to manage database transactions. Transactions are a fundamental concept in database systems, ensuring data integrity and consistency by grouping a set of SQL statements into a single logical unit of work. TCL commands allow developers to control when changes…
Posted inMY SQL Oracle PL/SQL SQL

IF ELSE Statement

In the world of SQL Server, conditional logic is a powerful tool that enables developers to execute specific actions based on certain conditions. Among the most commonly used constructs for implementing conditional logic is the IF ELSE statement. This versatile control-flow tool allows you to make decisions and dictate the flow…
having vs where clause
Posted inSQL SQL Server

Having vs Where clause

When working with SQL Server, it’s crucial to understand how to filter and manage data effectively. Two powerful clauses, HAVING VS WHERE CLAUSE, serve as essential tools in SQL for applying conditions and narrowing down query results. Despite their similarities, they have distinct purposes and use cases. This blog will explore their differences,…
select in where clause
Posted inSQL SQL Server

SELECT in Where clause

In SQL Server, the SELECT statement within a WHERE clause is a powerful technique used to filter records based on a condition derived from another query. This is commonly achieved using a subquery, which is a query nested inside another query. Subqueries can return a single value, a list of values, or even a…
sql limit
Posted inMY SQL Oracle PL/SQL SQL

SQL LIMIT

Summary: in this tutorial, you’ll learn to use the SQL LIMIT clause to limit the number of rows returned from a query. Introduction to SQL LIMIT clause  To limit the number of rows returned by a SELECT statement, you use the LIMIT and OFFSET clauses. Here’s the syntax of LIMIT & OFFSET clauses: SELECT column_list FROM table1 ORDER BY column_list LIMIT row_count…
sql distinct
Posted inSQL Server MY SQL Oracle PL/SQL

SQL DISTINCT

Summary: in this tutorial, you will learn how to use the SQL DISTINCT operator to select distinct values from a table. Introduction to SQL DISTINCT operator  To select the distinct values from a column of a table, you use the DISTINCT operator in the SELECT clause as follows: SELECT DISTINCT column1 FROM table_name; In this syntax,…