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SQL SELECT DISTINCT Statement: The SELECT DISTINCT statement in SQL is used to return only distinct (unique) values from a column or a combination of columns. This helps eliminate duplicate rows in the result set. Syntax for SQL SELECT DISTINCT Statement: SELECT DISTINCT column1, column2, ... FROM t...

19/09/2024

SQL SELECT Statement: The SELECT statement in SQL is used to retrieve data from one or more tables in a database. It allows you to specify which columns you want to retrieve and apply various conditions, groupings, and orderings to the data. Basic Structure of a SQL SELECT Statement SELECT column1,....

19/09/2024

DDL DML in SQL: In SQL (Structured Query Language), DDL (Data Definition Language) and DML (Data Manipulation Language) are two essential subsets that serve different purposes in managing and interacting with databases. Data Definition Language (DDL in SQL) DDL is used to define and manage the struc...

19/09/2024

SQL GROUP BY statement is used to arrange identical data into groups with the help of aggregate functions such as COUNT, SUM, MAX, MIN, and AVG. This statement is often used with aggregate functions to perform calculations on each group of data. SELECT column_name(s), aggregate_function(column_name)...