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SQL Handwritten Notes Repository: A collection of PDF notes covering SQL concepts with concise definitions and examples. Explore fundamental commands, date/time functions, joins, and more. Contributions welcome!
This edition of SQL Practice Problems assumes that you have some basic background knowledge about relational databases and tables. However, I’ve added some beginner level questions to gradually introduce the various parts of the SQL Select statement for those with less experience in SQL.
1 cze 2021 · Standard SQL Functions Cheat Sheet. TEXT FUNCTIONS. CONCATENATION. Use the || operator to concatenate two strings: SELECT 'Hi ' || 'there!'; -- result: Hi there! Remember that you can concatenate only character strings using. ||. Use this trick for numbers: SELECT '' || 4 || 2;
LIKE OPERATOR – PATTERN MATCHING. Use the _ character to replace any single character. Use the % character to replace any number of characters (including 0 characters). Fetch all names that start with any letter followed by 'atherine':
25 cze 2024 · Download the PDF of the SQL Basics Cheat Sheet; Download the PDF for SQL Constraints, Joins, Set Operators Cheat Sheet; Download the PDF of SQL Grouping, inbuilt, subquery, views, and temp table Cheat Sheet; Download the PDF for SQL User Define Function Cheat Sheet; Download the PDF for SQL Exception Handling Index, Pivot, Transactions Cheat Sheet
2 wrz 2024 · In this guide, we will see a comprehensive cheat sheet for essential SQL operations, offering a practical reference for tasks ranging from database creation to advanced data handling techniques.
It starts from the absolute basics (SELECT * FROM table_name;) and guides you to the intermediate level (JOIN, HAVING, subqueries). I added everything that you will need as a data analyst/ scientist. The ideal use case of this cheat sheet is that you print it in color and keep it next to you while you are learning and practicing SQL on your ...
