Microsoft Word - Sam's Teach Yourself MySQL in 21 Days - SAMS.doc
to understand smaller, more tangible objects and the simple relationships they share with all the other smaller objects. Needles ...
Address (^) Now all your tables are in Third Normal Form. This provides the most flexibility and prevents any logic errors when ...
Strong Join-Protection Normal Form, Over-Strong Join-Protection Normal Form, and Domain Key Normal Form. Each new level or form ...
Figure 6.1 Starting MySQL with an active database. From the blueprint that was developed on Day 3, "Designing Your First Databas ...
You should see a list of tables available in the Meet_A_Geek database. If you've been following along in the book, there should ...
I will use this convention set throughout this book. Feel free to use whatever makes you comfortable. The rules have been tried ...
Changing a Column Name Sometimes you may need to change the name of one of your columns. Maybe you misspelled it when you create ...
Where tablename is the name of the table you want to delete. For example, to delete the Customers table from the Meet_A_Geek dat ...
Deciding Which Columns to Include in the Index After you have decided to use indexes, you have to choose the column or columns y ...
ALTER TABLE tablename DROP PRIMARY KEY; Remember that a table can only have one primary key. If you decide that a different colu ...
The MySQL Supported Types MySQL has various data types that support different functions. A data type is the type of data a colum ...
TINYINT -128 to 127 0-255 SMALLINT (^) -32768 to 32767 0-65535 MEDIUMINT -8388608 to 8388607 0-16777215 INT -2147483648 to 21474 ...
inserted row into an AUTO_INCREMENT column starts at 1 and increases by 1 for every record that is inserted into the table. For ...
Size Space CHAR(X) 255 bytes X bytes VARCHAR(X) 255 bytes X+1 byte TINYTEXT (^255) bytes X+1 byte TINYBLOB (^255) bytes X+2 byte ...
slow things down considerably. TEXT and BLOB types are very large and do not make good candidates for indexes. Miscellaneous Typ ...
Additional Column Modifiers MySQL has several key words that modify how a column acts. For example, you have already learned abo ...
variable and fixed length. You learned the advantages and disadvantages of both of these. You also looked at the SET and ENUM ty ...
can perform. Day 11 introduces you to MySQL table locks and assorted keys. The week ends with a series of chapters—Day 12, "How ...
As you can see, there are many different ways of importing data into a database. How you do it is up to you. There are also many ...
same name. --fields-terminated- by=char This option specifies what character separates the values from one another. In a comma-d ...
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