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SQL Concepts, Tutorials, Examples, Sample Tables for practice Data Analysts Scientist Advanced Reports and KPIs, Oracle, DB2, Sybase, MySQL, Postgresql and Teradata.
SQL CONCEPTS
What is SQL, Table, Database and RDBMS
What is Relational Database
PRIMARY KEY
FOREIGN KEY
Creating Tables and Inserting Data
CREATE
ALTER
INSERT
Data Reading SQL Funtions with Examples
SELECT
COUNT
DISTINCT
SUM | MIN | MAX
LIKE
WHERE
See All
What is SQL ( Definition ) ? What is RDBMS ? What is TABLE ? What is DATABASE ?
What is SQL ( Definition ) ?
SQL - Is a STRUCTURED QUERY LANGUAGE which is mainly to interact with the following RDBMS databases such as: Oracle DB2 Sybase Microsoft SQL Server MySQL PostgreSQL etc.
What is RDBMS ?
RDBMS - Relational Database Management Systems. These Databases are collection of related tables. Example - SALES_DB this database by name contains all the tables in relation with the sales. They can be sales tables, payment tables, vendor tables etc.
What is TABLE ?
TABLE - Collection of COLUMNS and ROWS.
What is DATABASE ?
DATABASE - Collection of TABLES.