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16 sie 2014 · This document discusses different types of SQL functions including string, numeric, conversion, group, date/time, and user-defined functions. It provides examples of common string functions like UPPER, LENGTH, SUBSTR. Numeric functions covered include ABS, ROUND, POWER.
16 gru 2016 · This document provides an introduction to SQL and relational database concepts. It explains that SQL is used to manipulate and retrieve data from relational databases. It also outlines the main SQL commands: DDL for data definition, DML for data manipulation, DCL for data control, and DQL for data queries.
CREATE OR REPLACE PROCEDURE total_val (IN Member# CHAR(6), OUT total DECIMAL(12,2)) LANGUAGE SQL BEGIN. SELECT SUM(curr_balance) INTO total FROM accounts WHERE account_owner=Member# AND account_type IN ('C','S','M'); END. CALL it from an SQL interface.
23 kwi 2015 · This document provides information about SQL queries and joins. It begins by introducing SQL (Structured Query Language) which is used to communicate with databases and retrieve required information. It describes the basic CRUD (Create, Read, Update, Delete) functions of SQL.
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.
14 wrz 2022 · SQL is specialized to handle ‘structured data’ that follows relational model – data that incorporates relations among entities and variables. Used to interact with relational databases to manage data: create, populate, modify, or destroy data. Also can manage data access. SQL is a standard language.
It begins by introducing SQL query categories like data definition, data management, and data query. It then provides examples of SQL queries like using SELECT to project attributes and filter rows, JOINs to retrieve data from multiple tables, and functions like COUNT, MIN, MAX, and AVG.
