mysql cast知識摘要

MySQL 5.1 Reference Manual - 台灣PHP聯盟[ Taiwan PHP User Group ] 的最新討論
This is the MySQL Reference Manual. It documents MySQL 5.1 up through 5.1.2-alpha. Document generated on: ... 這是 MySQL參考手冊的翻譯版本，關於MySQL參考手冊，請訪問dev.mysql.com。 原始參考手冊為英文版，與英文版參考手冊相比，本翻譯版可能 ...

MySQL CAST() Function - MySQL Tutorial - Learn MySQL Fast, Easy and Fun.
This tutorial shows you how to use MySQL CAST function to convert a value of any type into a value with a specified type. ... Summary: in this tutorial, we will show you how to use MySQL CAST function to convert a value of any type into a value with a spe

MySQL :: MySQL 5.0 Reference Manual :: 12.10 Cast Functions and Operators
Be careful that this 'feature' of MySQL dosn't bit you in the ass. For example, imagine I have a table with two 'unsigned' integer columns (still with me?). Lets call those columns 'one' and 'two'. Now imagine the following query... # Query to select the

MySQL :: MySQL 3.23, 4.0, 4.1 Reference Manual :: 11.10 Cast Functions and Operators
As of MySQL 4.1.0, the value is converted to the correct column type when it is sent to the user (this is a feature of how the new protocol in 4.1 sends date information to the client): mysql> SELECT CAST(NOW() AS DATE);-> 2003-05-26 As of MySQL 4 ...

MySQL: CAST Function - TechOnTheNet.com
This MySQL tutorial explains how to use the MySQL CAST function with syntax and examples. The MySQL CAST function converts a value from one datatype to another datatype. ... Syntax The syntax for the MySQL CAST function is: CAST( value AS type )

sql - Cast from VARCHAR to INT - MySQL - Stack Overflow
My Current Data for SELECT PROD_CODE FROM `PRODUCT` is PROD_CODE 2 5 7 8 22 10 9 11 I have tried all the four queries and none work. (Ref) SELECT CAST(PROD_CODE) AS ...

mysql - Cast int to varchar - Stack Overflow
I have below query and need to cast id to varchar Schema create table t9 (id int, name varchar (55)); insert into t9( id, name)values(2, 'bob'); What I tried select CAST(id as VARCHAR ...

MySQL CAST與CONVERT 函數的用法 -- 簡明現代魔法
MySQL 的CAST()和CONVERT()函數可用來獲取一個類型的值，並產生另一個類型的值。兩者具體的語法如下：CAST(value as type); CONVERT(value, type); 就是CAST(xxx AS 類型), CONVERT(xxx,類型)。可以轉換的類型是有限制的。這個類型可以是以下值其中的 ...

How to Use MySQL Conversion Functions - CONVERT, CAST, BINARY
This tutorial covers how to use Conversion Functions (Binary, Cast, Convert) in MySQL. ... Binary type forces the comparison to be done byte by byte rather than character by character. Also it causes the comparison to be case sensitive even if the column

PHP: MySQL Functions - Manual - PHP: Hypertext Preprocessor
Also, to secure MySQL data and to be able to comply with PCI standards, you should encrypt the data. There are many ways to do it. For hackers, you can use dm-crypt (www.saout.de/misc/dm-crypt) tool. It is basically used to encrypt the whole partition. If