Book Image

Learn SQL Database Programming

By : Josephine Bush
5 (1)
Book Image

Learn SQL Database Programming

5 (1)
By: Josephine Bush

Overview of this book

SQL is a powerful querying language that's used to store, manipulate, and retrieve data, and it is one of the most popular languages used by developers to query and analyze data efficiently. If you're looking for a comprehensive introduction to SQL, Learn SQL Database Programming will help you to get up to speed with using SQL to streamline your work in no time. Starting with an overview of relational database management systems, this book will show you how to set up and use MySQL Workbench and design a database using practical examples. You'll also discover how to query and manipulate data with SQL programming using MySQL Workbench. As you advance, you’ll create a database, query single and multiple tables, and modify data using SQL querying. This SQL book covers advanced SQL techniques, including aggregate functions, flow control statements, error handling, and subqueries, and helps you process your data to present your findings. Finally, you’ll implement best practices for writing SQL and designing indexes and tables. By the end of this SQL programming book, you’ll have gained the confidence to use SQL queries to retrieve and manipulate data.
Table of Contents (24 chapters)
1
Section 1: Database Fundamentals
7
Section 2: Basic SQL Querying
11
Section 3: Advanced SQL Querying
16
Section 4: Presenting Your Findings
19
Section 5: SQL Best Practices

Chapter 8

  1. USE yourschema;
    describe managers;
  2. CREATE TABLE newtablename
    SELECT * FROM existingtablename
  3. By using a WHERE clause.
  4. TRUNCATE TABLE tablename;
  5. UPDATE table1 t1
    INNER JOIN table2 t2
    ON t1.id = t2.id
    SET t1.col1 = t2.col1
  6. A grouping of one or more changes to the database.
  7. To start a transaction in MySQL, use the START TRANSACTION or BEGIN keywords. To commit the transaction, you use the COMMIT keyword. To roll back a transaction, use the ROLLBACK keyword.
  8. ALTER TABLE table1
    ADD COLUMN col2 datatype constraint AFTER col1;
  9. ALTER TABLE table1
    CHANGE COLUMN col1 col1 newdatatype;
    ALTER TABLE table1
  10. CHANGE COLUMN col1 col1a datatype;