Database Design Manual: using MySQL for Windows (Springer - download pdf or read online
By Matthew Norman
Crucial SQL quick presents a complete consultant to SQL, utilizing the Windows-based model of MySQL. MySQL is a freely on hand, multi-platform database administration approach, making it perfect for studying the recommendations and ideas of database layout. utilizing a variety of labored examples and illustrations, Matthew Norman describes easy methods to arrange the database administration process MySQL. In doing so he covers a number of issues, together with: fitting and checking out MySQL; utilizing the graphical instruments; database layout ideas and ideas; retrieving, altering and deleting information; and the way to make different items converse with MySQL.
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Extra info for Database Design Manual: using MySQL for Windows (Springer Professional Computing)
Although lots of data is repeated, it is not necessarily all redundant. Data is classed as redundant if it can be removed from a table without loss of information. 2. 2 has more obvious redundancies. You will notice that in the six rows shown, only three of these rows are unique. When a remote machine accesses a webserver, it does this via its web browser software, using its IP number which is matched (usually) to its domain name. While that browser is looking at pages on your site, normally these three pieces of information remain the same for each page request.
If you compare this with the text ﬁle you will see that the column order is different. LOAD DATA allows you to specify the order of columns to import by just giving it a list of the rows. We now have enough information to insert our log ﬁle into the Log table. 7 The Log table populated by LOAD DATA. 7 shows the results of the above query, when we select everything from the Log table. The above process can seem like a lot of effort to put 5 rows in a table; we have had to manipulate the load command and probably could have inserted that many rows in the same time by using INSERT statements.
The small range is due to the YEAR being stored in a single byte. The best way of inserting a date into this column is by specifying a string with 4 digits, for example: 1952 2010 2063 If you only use two digits, MySQL has to make a decision about what year you are referring to. For more information about how it chooses you can consult the section in the online MySQL manual. MySQL will always output the contents of the YEAR datatype with 4 digits to avoid confusion. Other Types All of the previous datatypes will have been used to store data that you are familiar with, like dates, times and numbers.
Database Design Manual: using MySQL for Windows (Springer Professional Computing) by Matthew Norman