SQL stands for ‘Structured Query Language’. SQL is domain-specific language, NOT a general programming language. SQL is specialized to handle ‘structured data’ that follows relational model – data that incorporates relations among entities and variables.
Key relational database concepts like tables, records, columns, and relationships are defined. Constraints, data types and integrity are discussed. Examples are provided for SQL statements like CREATE, INSERT, UPDATE, DELETE, and SELECT. - Download as a PPTX, PDF or view online for free
The goal of this course is not that you are an expert at SQL, but that you have enough of foundation that you can continue to learn and improve your skills. This course will not cover database...
These statements are not evaluated by the SQL engine but help the reader understand the intent and the approach behind an individual line of code or the script as a whole
This guide covers essential SQL concepts such as SELECT statements, filtering, sorting, joins, and data manipulation. Whether you're a student, aspiring data analyst, or software developer, this tutorial provides step-by-step explanations to help you confidently interact with relational databases.
SQL, or Structured Query Language, is used to access and manipulate databases, allowing users to execute queries, retrieve, insert, update, and delete records. It is based on Relational Database Management Systems (RDBMS) where data is stored in tables.
SQL stands for ‘Structured Query Language’. SQL is domain-specific language, NOT a general programming language. SQL is specialized to handle ‘structured data’ that follows relational model – data that incorporates relations among entities and variables.
Explains basicSQL syntax involving statements, table names, conditions, and example query structure. Highlights SQL queries and their functional purpose in database management. Describes function queries in SQL, categorizing them into aggregate and scalar functions.
Notice trick: subquery is really a stored table. Why SQL? SQL is a high-level language. Expresses “what to do” rather than “how to do it.” Avoid a lot of data-manipulation details needed in procedural languages like C++ or Java. Database management system figures out “best” way to execute query.