Microsoft Word - Sam's Teach Yourself MySQL in 21 Days - SAMS.doc
+-----------------+ or, when used in a numeric context mysql> SELECT SEC_TO_TIME(1000)+0; which results in +----------------- ...
Adding and Subtracting Time MySQL offers a number of ways of adding and subtracting time. You have the following functions avail ...
+-----------------------------------------+ Experiment with a little time manipulation, say adding 72 hours to 9 a.m. Monday mor ...
results in +-----------------------+ | PERIOD_ADD(200004,-2) | +-----------------------+ | 200002 | +-----------------------+ No ...
form as MySQL outputs it (YYYY-MM-DD for dates and HH:MM:SS for times) if data in these formats is available. Exercises Write a ...
Update_priv Gives the user the ability to edit table data by using the UPDATE statement. Delete_priv Grants the user the abi ...
Db The database that contains the tables to which you’re applying privileges. User The username of the person to whom you ar ...
As you can see, there are two control points. One point is the connection verification, and the second control point is the requ ...
Figure 17.2 The request verification process. Modifying User Privileges You may be wondering if you have to worry about the way ...
using the machine with the specified IP address or a computer in the staff.jsmc.org domain. If you do not want to limit the comp ...
IDENTIFIED BY "password" [WITH GRANT OPTIONS] This may seem a little intimidating at first, but it is quite easy. After the keyw ...
Now give Scott UPDATE privileges only on the First_Name and Last_Name columns of the Customers table. To do this, issue the foll ...
These commands will delete Scott’s records from the user and db tables where the hostname is the wildcard. Scott’s other records ...
When dealing with security, it is always best to start off as strict as possible, and then loosen up the security as you go. Whe ...
Day 18: How MySQL Compares Overview There has been a lot of discussion about open source software. A lot of people do not place ...
Transaction-Based Databases Some databases use a form of SQL called Transact-SQL or T-SQL (Microsoft SQL Server and Sybase Adapt ...
MySQL is not a transactional database system. It does not use T-SQL. You cannot issue a statement like the one in the previous e ...
Creating a UDF is quite an involved procedure. Each UDF should appear as a function in your C++ program. Each UDF can have an op ...
{ strcpy(message,"Wrong arguments to Double_Proc"); return 1; } return 0; } void Double_Proc_deinit(UDF_INIT *initid) { } long l ...
It is also worth mentioning that you can have more than one UDF in a file; You could create as many UDFs in one file as you want ...
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