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1 cze 2021 · Fetch all names that start with any letter followed by 'atherine': SELECT name FROM names WHERE name LIKE '_atherine'; Fetch all names that end with 'a': SELECT name FROM names WHERE name LIKE '%a'; USEFUL FUNCTIONS. Get the count of characters in a string: SELECT LENGTH('LearnSQL.com');-- result: 12 Convert all letters to lowercase: SELECT ...
SQL is a standard language for storing, manipulating and retrieving data in databases. 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 »
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; Chapter 7: Comments; Chapter 8: Common Table Expressions; Chapter 9: CREATE Database; Chapter 10: CREATE FUNCTION; Chapter 11: CREATE TABLE
25 lut 2018 · vi SQL For Dummies REF types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 User-defined types ...
Introduction. What Is SQL? Syntax & Structure. | 1 | Retrieving Data with SQL. The SELECT Statement. The FROM Clause. Limiting Data by Specifying Columns. SQL Predicates. Returning DISTINCT rows. TOP. The WHERE Clause. Table. 1 : List of conditional operators. Comparison Operators. Logical Operators.
WINDOW FUNCTIONS. Window functions compute their result based on a sliding window frame, a set of rows that are somehow related to the current row. AGGREGATE FUNCTIONS VS. WINDOW FUNCTIONS. Unlike aggregate functions, window functions do not collapse rows. current row.
You can down‐load it at http://sqlitestudio.pl/?act=download. Be sure to choose Windows, Mac, or Linux for your respective OS. Then open the downloaded folder and copy it to a loca‐tion of your choice. No installation is needed. To start SQLiteStudio, double-click SQLiteStudio.exe (Figure 3-1).
