Search results
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!
Learning SQL eBook (PDF) Download this eBook for free. Chapters. Chapter 1: Getting started with SQL. Chapter 2: ALTER TABLE. Chapter 3: AND & OR Operators. Chapter 4: Cascading Delete. Chapter 5: CASE. Chapter 6: Clean Code in SQL.
1 cze 2021 · Some databases implement non-standard solutions for concatenating strings like CONCAT() or CONCAT_WS(). Check the documentation for your specific database. Use the _ character to replace any single character. Use the % character to replace any number of characters (including 0 characters).
1 cze 2021 · Check the documentation for your specific database. 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': SELECT name FROM names WHERE name LIKE '_atherine';
Advanced SQL String and Date/Time Functions String Operations • SQL-92 defines string functions. Many DBMSs also have their own unique functions • These functions can be used in any expression (projection, predicates, e.t.c.) SELECTSUBSTRING(name,0,5)ASabbrv_name FROMstudentsWHEREsid=1 SELECT*FROMstudentsASs WHEREUPPER(e.name)LIKE 'M%'
This 3-page SQL Cheat Sheet provides you with the most commonly used SQL statements. Download the SQL cheat sheet, print it out, and stick to your desk.
Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems. Start learning SQL now » Examples in Each Chapter
