MySQL is a free, open-source database engine available for all major platforms.

My. SQL Tutorial 1: Overview, Tables, Queries — Navigate this multi- page article with the arrows and drop- down lists at the top and bottom of each page — Note: In this article, footnotes are marked with a light bulb over which one hovers. Introduction. My. SQL is a free, open- source database engine available for all major platforms. A relational database is able to create relationships between individual database elements, to organize data at a higher level than a simple table of records, avoid data redundancy and enforce relationships that define how the database functions. These articles will familiarize the reader with basic database concepts, move on to My. SQL, and show how to create a useful database, step by step. First Steps. Basic Database Terminology.

In this tutorial, you will learn how to use MySQL UPDATE statement to update data in a table.

SQL Workbench/J - Release History. Build 122 (2017-02-04) Enhancements. Conditional execution of Workbench commands now support -isDBMS and -isNotDBMS. UPDATE is a DML statement that modifies rows in a table. Single-table syntax: UPDATE Drop MySQL Tables - Learn MySQL from basic to advanced covering database programming clauses command functions administration queries and usage along with PHP in. This tutorial shows you how to perform cross-table update by using MySQL UPDATE JOIN statement with INNER JOIN and LEFT JOIN.

My. SQL creates, configures, and communicates with databases. A database is an organized collection of data. At its simplest, a database will consist of tables like this. Name. . Age. . Favorite Color. Bruce Callow. . 1.

I haven't decided yet. More exotic databases link tables together relationally, so that specific values that might appear in hundreds of tables only need to be defined in one (a topic to be covered later).

I've always thought that direct experience is a good way to inspire confidence in one's abilities, so we'll start out by creating a database and a table at the keyboard, by direct interaction with My. SQL.(Because the procedure for installing My. SQL is different on each platform, and because the installation process is nearly automatic in modern times, I've decided not to cover installation issues. At this point I assume the reader has successfully installed My. SQL and has logon authority in the system.)Start the My.

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SQL command- line application. I'll make this one concession to the differences between platforms: Windows: Start - > All Programs - > My. SQL - > My. SQL Server (version) - > My. SQL (version) Command Prompt.

MySQL UPDATE Query - Learn MySQL from basic to advanced covering database programming clauses command functions administration queries and usage along with PHP in. MySQL (officially pronounced as / m a. Its name is a. 19 thoughts on “How-To: Guide to Database Migration from Microsoft SQL Server using MySQL Workbench”.

Linux, OSX: Open a shell session and type . If your My. SQL installation is new, the list should be short.

Now let's try generating an error — what happens if we try to create a database that already exists? Type this. mysql> create database tutorial; ERROR 1. HY0. 00): Can't create database 'tutorial'; database exists.

I should tell you that's one of the more informative My. SQL error messages — most messages require the user to figure out what went wrong. Now that we have created our database, let's tell My. SQL to use it for subsequent entries.

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NOTE: There's an alternative to telling My. SQL which database to use — one simply prepends the database name to each table reference, like this: . When dealing with multiple databases, this is often more convenient. Make a Table. In serious database work, one spends a fair amount of time in advance of table creation deciding what fields each table record should have, and what data types the fields should contain. But for this first effort, we'll limit ourselves to a simple table. In the entry below I have included a common error, to make the reader aware of an issue having to do with spaces.

Watch what happens. Name text, Age integer, Favorite Color text); ERROR 1. You have an error in your SQL syntax; check the manual that corresponds to your My. SQL server version for the right syntax to use near 'Color text)' at line 1. Apart from showing the first of the dreaded and uninformative My. SQL error messages, what's wrong?

Well, think about this — can My. SQL figure out which parts of our entry are field names, and which are data types? The first field name is . The field name and data type are separated by a space.

But the field name . So — error message, and no table. Here is the solution — enclose problem field names in backticks (`). Name text, Age integer, `Favorite Color` text); mysql> describe trivia. This table happens to be empty, but the same command works with a table having a million records — it just goes away with no warning. Now we have a table ready to accept records describing people by name, age and favorite color.

It's time to insert some real data. Again, I have deliberately introduced an error. Bruce Callow,1. 3,I haven't decided yet.); The above example is truly pathological in its errors, and I won't try to even list the possible outcomes, depending on what the reader types to try to recover. But here's the correct entry. Bruce Callow','1. I haven''t decided yet.'); mysql> select * from trivia.

Examples: 'Bruce Callow', . But quoting a number is not an error, and in some cases, for consistency, all values might be enclosed in quotes. The string . Unfortunately the apostrophe is also sometimes used as a quotation mark, which will confuse My. SQL about where the string ends.

One solution is to use double quotation marks around this specific field: . Another solution is to . Here's how. mysql> delete from trivia; mysql> select * from trivia; Empty set (0.

Again, as with . And please notice that . Now we can perform our first meaningful query. Age = 1. 3. +- -- -- -- -- -- -- -+- -- -- +- -- -- -- -- -- -- -- -- -- -- -- -+. The reason he didn't is because My.

SQL sorted the names just as we entered them — as a single string composed of first name, then last name. At this point it may occur to the reader that name data should always be entered into separate fields for first and last name. The underlying idea is that one can always combine a first and last name to create a full name, but one cannot easily do the reverse. Split a Field in Two, Make a New Table. This is slightly more ambitious — we're going to create a new table with separate fields for first and last name, then we're going to transfer all the records from the original table into the new one.

The point of this exercise is to show how to do this without having to re- enter the records. Here's the procedure: As a first step, before creating a new table, let's see if we can successfully split the . Now let's create a new table with the names split in the same way. First. Name text not null, Last.

Name text not null, Age integer not null, `Favorite Color` text not null); mysql> describe triviab. This isn't always necessary — in many cases one can write a query for an existing table to get different results without having to create a new table each time. Examples. mysql> select * from triviab order by Last. Name, First. Name. Readers have two ways to get this table into their tutorial database: Download and load into your My.

SQL database the My. SQL- formatted table description file people. Download and run the original Python program generate. Here is how to proceed: Right- click here: people.

As tables become larger, the presence of a unique primary key becomes more important for a number of reasons. One, My. SQL can read from and write to the table more efficiently. Two, it makes each record unique — without a unique key, two records with identical field data would not be distinct (My. SQL would not be able to tell them apart).

There's another, even more important role for table keys in the design of relational databases, a topic we'll be getting into later. But back to our new table — with 1.

Here are some examples. Let's say you're responsible for a company database, and your boss shows up and asks, ? Being fully versed in modern database technology, you create an answer for him in a matter of seconds. Age < = 2. 0 and Music = 'Rock'. This also allows you to compare your results with the original ones, as an accuracy check for your query entries. The boss thinks for a minute and asks, .

But this example uses a much larger U. S. ZIP code database having over 4. Download Film Dream High 2 Subtitle Indonesia Moon.

I include this query example because it shows that one can extract many interesting facts from a large table with many fields. We will proceed as in the previous example, but with one possible change — this database is so large that users may elect to download a zipped version of the file: Download zipcodes. This will yield a file named .