9/5/2023 0 Comments Ch4 password creator java gui![]() Other databases that were created when MySQL was installed on the server. The results here show the rookery database, and three To get a list of databases, enter the following SQL statement: SHOW DATABASES Now that we’ve created a database, let’s confirm that it’s there, on You know they exist if you need to set them one day. I’m only mentioning the options here so that In fact,įor most purposes, the minimal method of creating a database without We’ll discuss binary characters and binary sorting in a laterĬhapter, but it’s not necessary to understand that at this point. The third line tells MySQL that theĭefault method of sorting data in tables is based on binary LatinĬharacters. The default characters that will be used in tables in the database are The second line, which is new, tells MySQL that One-remember, all of this is one SQL statement spread over two lines,Įnding with the semicolon. The first line in this SQL statement is the same as the earlier It again like so: DROP DATABASE rookery CREATE DATABASE rookery CHARACTER SET latin1 COLLATE latin1_bin So, let’s drop the rookery database and create The default types of characters that will be used in the database and howĭata will be sorted or collated. You can add a couple of options in which you can set You can, though, do a bit more than the SQL statement shown here forĬreating a database. ![]() Incidentally, if youĭon’t like the keyword DATABASE, you can use SCHEMA instead: CREATE SCHEMA Place to add tables, which will in turn hold data. To do this, enter the followingįrom within the mysql client: CREATE DATABASE rookery Īs previously mentioned, this very minimal, first SQL statement willĬreate a subdirectory called rookery on the filesystem in theĭata directory for MySQL. To start, let’s create a database that will contain information aboutīirds and call it rookery. Someīirds live in groups, or a colony called a rookery. I’m a fan of birds, so I’ve used a database ofĪ fictitious bird-watching website for the examples in this book. Provide a name for the database with this SQL statement. Reinforce what you read, and you will learn more.Ĭreating a database is simple, mostly because there’s nothing much That you complete the exercises included for each chapter. Thus, in order to get the most value possible from this book, it’s important That you have created the tables you are asked to create in this chapter. In those laterĬhapters, you will be asked to add, retrieve, and change data from the Used in several chapters in this book, especially in Part III. The database and the tables that we create in this chapter will be So, when instructed, be sure to try all of the examples on your Some changes and additions to the database and its tables on your computer. The exercises at the end of this chapter will require that you make The text is written on the assumption that you will enter the SQL statementsĬlient. This chapter contains examples of how to create a database and tables. As we get further along, we canĮxpand that list of column data types to improve the performance of your Point for creating a database and tables. ![]() The number of tables to include in your database, as well as theįor each table, the number of columns it should contain, as wellįor each column, what kind of data is to be storedįor the last part, in the beginning, we’ll use just four types ofĬolumns: columns that contain only numbers columns that containĪlphanumeric characters, but not too many (i.e., a maximum of 255Ĭharacters) columns that contain plenty of text and maybe binary files andĬolumns for recording date and time information.
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