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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!
10 sty 2012 · It has to do with the Normal Form for the SQL language. IF statements can, by definition, only take a single SQL statement. However, there is a special kind of SQL statement which can contain multiple SQL statements, the BEGIN-END block.
12 wrz 2022 · Learn how to build conditional logic when writing SQL code using IF, BEGIN, END, ELSE, and ELSEIF logic.
1 SELECTcolumn_name(s) 2 FROMtable_name 3 WHEREcolumn_name operatorALL 4 (SELECTcolumn_nameFROMtable_nameWHEREcondition); 2.3 String Pattern Matching 2.3.1 Quotes In SQL, strings are denoted by single quotes. Backticks can be used to denote column and table names. This is useful when the column or table name is the same as a SQL keyword and
24 maj 2021 · The IF…ELSE structure will execute a certain block of code if a specified condition is TRUE, and a different block of code if that condition is FALSE. Here is the basic layout and syntax of the IF…ELSE structure: IF(<condition is true>) BEGIN <execute some code> END ELSE BEGIN <execute some different code> END
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.
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
