The field is similar to the previous construction method and behavior method;
Package javainvokefiled;Import Java.lang.reflect.Field; /*** Reflection Get Field* @author Administrator**/Class filed{public String name;private int age;private int
Powerful PHP can use the relevant functions of MySQL interaction to get data table field information, such as can get data table get field name, field length, field information and so on.
The powerful PHP tutorials can take advantage of the MySQL
php Get field length correlation function using tips _php tutorial
As a qualified
When you design a database, the length of each field is not exactly the same because each field represents a different meaning of the data. In PHP, the use of the
In web development, you always encounter database-related operations. As a beginner, this is something that must be mastered. Here's a concrete analysis.
fields, in addition to field names, data types, and lengths, have other properties, such as
As a qualifiedWhen you design a database, the length of each field is not exactly the same because each field represents a different meaning of the data. In PHP, the use of the Mysql_field_len () function enables PHP to get the field length, which
1. Select or deselect all rows on the pageUsing the Selectallrowsonpage methodGrammar 1:void Selectallrowsonpage ()Syntax 2:void selectallrowsonpage (bool selected)Parameter selected indicates that all rows are selected or deselected2. Select or
1 SELECT2Table name= Case whenA.colorder=1 ThenD.nameElse "' End,3Table description= Case whenA.colorder=1 Then IsNull(F.value,"')Else "' End,4Field ordinal=A.colorder,5Field name=A.name,6Identity= Case when ColumnProperty(
PHP Gets the field length Mysql_field_len is the length of the value returned by getting mysql_query,
Grammar:
Mysql_field_len (Data,field_offset)
Data: Required option. Specifies the data pointer to use. The data pointer is due to the mysql_query (
For a beginner, they must learn in the course of learning the flexible use of various
The Mysql_field_type () function obtains the data type of the field, and the syntax of the function is as follows.
String Mysql_field_type (resource $result, int $
We pass on
The Mysql_num_fields () function can count the number of all fields in the table that will be queried, and the syntax of the function is as follows:
int Mysql_num_fields (Resource $result)
Where the parameter result is the result set
In the PB development process, because the database uses the ntext field, the following prompts the error, depressed for a long time can not find the solution, after consulting a large number of data, finally understand:PB Error: You cannot use
Java Web code generator, which focuses on Java Web project general purpose code generator and Java Web Code Generator
This project is a general code generator for the javaWEB project. jsp, js, And java files are generated based on database tables
PHP Function Index 967 functions
A total of 967 functions
Abs: Get absolute value.
Acos: Gets the inverse cosine value.
Ada_afetch: Gets the return column of the database.
Ada_autocommit: Switch automatic change function.
Ada_close: Close Adabas D
-Function Manifest Index:-Open: Opening database connection line:71-Close: Closes the database connection line:107-SELECTDB: Select Database line:129-Query: Create queries line:151-Dataseek: Move record pointer line:175-FieldName: Get field name
This example describes the database operations classes available in MYSQL,MSSQL,PG three databases, and you can easily change the type of your database as long as you make any changes. Share it for your reference. The specific analysis is as follows:
I. Overview
When you write a database program with Delphi, often involves importing and exporting data, such as storing data from a large database as a portable file for easy reading, importing data stored in a file into another database, and, by
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.