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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 · 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. If you omit the BEGIN-END block, your SQL will run fine, but it will only execute the first statement as part of the IF. Basically, this:
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.
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
12 wrz 2022 · Learn how to build conditional logic when writing SQL code using IF, BEGIN, END, ELSE, and ELSEIF logic.
1 cze 2021 · SELECT REPLACE('LearnSQL.com', 'SQL', 'Python');-- result: LearnPython.com. NUMERIC FUNCTIONS. BASIC OPERATIONS. Use +, -, *, / to do some basic math. To get the number of seconds in a week: SELECT 60 * 60 * 24 * 7; -- result: 604800. CASTING. From time to time, you need to change the type of a number. The . CAST() function is there to help you ...
17 sie 2023 · 20 Basic SQL Query Examples for Beginners. Tihomir Babic. sql basics. Table of Contents. What Is SQL? Dataset. 1. Selecting All Columns From One Table. 2. Selecting One Column From One Table. 3. Selecting Two Columns From One Table. 4. Selecting Two (or More) Columns From One Table and Filtering Using Numeric Comparison in WHERE. 5.
