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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! Happy studying and coding!
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; -- result: 42.
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';
Download. 01 - SQL - Oracle SQL Training Manual.pdf. 01 - SQL - Oracle SQL Training Manual.pdf.
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
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; -- result: 42.
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%'
