The examples in this tutorial are all done using the free version of SQL Server - SQL Server Express with Tools. You can download SQL Server This tutorial explains some basic and advanced concepts of SQL Server such explained using examples for easy understanding. .. This edition has a built-in expiry of 6 months from the time that you install it. R2. . Manual: This one runs just like any other T-SQL statement, once you issue. This tutorial will give you quick start with SQL. Before you start doing practice with various types of examples given in this reference, I'm .. MS SQL Server.
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If a tutorial uses one of the Adventure Works databases, you should To download SQL Server samples to use with tutorials, go to. Download Microsoft SQL Server Express Edition. 4. Install Microsoft SQL 6. Connect to the CIDM SQL Server Instance and Test So for example if you have a. 𝗣𝗗𝗙 | This book offers a short reference tutorial for database engineers Structure of inner and natural joins An example using INNER JOIN syntax is given below. The SQL Server database doesn't support the NATURAL JOIN clause. Databases. Practical SQL Guide for Relational Databases.
Query to Display User Tables A user-defined table is a representation of defined information in a table, and they can be used as arguments for procedures or user-defined functions.
Query to Display Primary Keys A primary key uniquely identifies all values within a table. Displaying Foreign Keys Foreign keys link one table to another — they are attributes in one table which refer to the primary key of another table.
The list of defined triggers can be viewed using the following query.
Displaying Internal Tables Internal tables are formed as a by-product of a user-action and are usually not accessible. The data in internal tables cannot be manipulated; however, the metadata of the internal tables can be viewed using the following query. Displaying a List of Procedures A stored procedure is a group of SQL queries that logically form a single unit and perform a particular task.
Swapping the Values of Two Columns in a table In this and subsequent examples, we will use a common company database including several tables which are easily visualized.
Our practice DB will include a Customers table and an Order table.
With this in mind, we can easily imagine an Orders table which likewise contains the indexed customer ID field, along with details of each order placed by the customer. In our first one of SQL examples, imagine a situation where the zip and phone fields were transposed and all the phone numbers were erroneously entered into the zip code field. Returning a Column of Unique Values Now, suppose that our data entry operator added the same Customers to the Customers table more than once by mistake.
As you know, proper indexing requires that the key field contain only unique values. Between Monday and Tuesday Today is Wednesday, and we arrive at work and discover that our new data entry clerk in training has entered all new orders incorrectly on Monday and Tuesday.
We wish to teach our new trainee to find and correct all erroneous records.
Finding the Intersection of Two Tables Undoubtedly the whole reason that a relational database exists in the first place is to find matching records in two tables! Making Column Labels More Friendly Aliasing column labels give us the convenience of renaming a column label to something more readable. There is a tradeoff when naming columns to make them succinct results in reduced readability in subsequent daily use. I like to write SQL query and optimize it and that's why I always read books on databases.
In this article, I am going to share 4 free books, first is about database performance tips for developers, perfectly suited to me and many Java developers who write stored procedures, queries, and SQL scripts and this is one of those books, which I think every developer should read.
The second book in the list is about SQL code smells, which talks about common SQL practices which every programmer should avoid dealing with the database. It contains code smells and I think the list is probably growing to , you can find more SQL code smells on their website.
This is again a good book for all developers who write SQL queries or deal with the database. The third and fourth book is about Microsoft SQL Server database, one focus on transaction log management, probably an advanced concept for many developers but very useful for DBAs and the second one is an introductory book on Microsoft SQL server database.
A good book if you want to learn SQL Server from scratch. The list is by no means exhaustive and first, a couple of books are really short which you can finish in a couple of days but they are also packed with a lot of useful information which every programmer who writes SQL query or works with the database should be aware of. This book will immensely help you to improve your application's database performance. You can download this book as PDF and read offline.
You can also check their website for more database performance tips. I strongly recommend every developer to read this book because SQL is an essential part of programming career and knowledge you will gain by reading this book will serve you for a long time.
It covers performing transaction log backup and restore monitoring and managing log growth, including quick diagnosis of the causes of rapid growth, and optimizing log architecture to maximize log throughput and availability.