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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).
SELECT. CustomerID , TotalOrderAmount. , CASE WHEN ((TotalOrderAmount > 0) AND (TotalOrderAmount <= 1000)) THEN ’low’ WHEN ((TotalOrderAmount > 1000) AND (TotalOrderAmount <= 5000)) THEN ’medium’ WHEN ((TotalOrderAmount > 5000) AND (TotalOrderAmount < 10000)) THEN ’high’ ELSE ’very high’ END AS CustomerGroup. FROM.
This book starts with a theoretical background to T-SQL querying and programming in Chapter 1, laying the foundations for the rest of the book, and basic coverage of creating tables and defining data integrity.
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.
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':
This document provides solutions to review questions, multiple choice questions, hands-on assignments, and a case study related to Chapter 6 of the textbook "Oracle 12c SQL 3rd Edition Casteel". It includes explanations and code for using sequences, indexes, synonyms, and other SQL features in database design and implementation.
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
