Pod extension is added in PHP5, which provides PHP built-in class PDO to access the database, different databases use the same method name, to solve the problem of non-uniform database connection.
features of PDO:
Performance. PDO has learned
Object-oriented approach
First look at the handling of connection errors, PDO error handling in PHP, using an object-oriented approach:
Copy Code code as follows:
try {
$db = new PDO (' Mysql:host=localhost;dbname=test ', $user,
Recently encountered in the development of some problems, here to record the solution to the method, has been prepared to forget.1, now create the role of the game, basically support the role of the name of the random, previously this function in
The command-line processor is the DB2 interface, which best embodies the power of DB2, as well as the simplicity and versatility of DB2. The author makes a detailed exposition of it through examples.0 Reviews:Blair Adamache, DB2 technology
Pod extension is added in PHP5, which provides PHP built-in class PDO to access the database, different databases use the same method name, to solve the problem of non-uniform database connection.features of PDO:Performance. PDO has learned from the
Source: http://www.cnblogs.com/zhuyp1015/p/3575823.html will use several tables mysql> DESC products;+------------+--------------+- -----+-----+---------+----------------+| Field | Type | Null | Key | Default | Extra |+------------+--------------+---
All messages sent by the PostgreSQL server are given a five-character error code that follows the custom of the SQL "SQLSTATE" code. Apps that need to know what error conditions are occurring should usually test the error code instead of the text
Solution: after reading it online, you can change the user table of the mysql database and add a data with the host value of %, but it still does not work. Later, log on to mysql directly and grant the access permission. Run [root @ iZ25p77kem7Z ~]
The disk space of the restored database file is insufficient.
You can use the following statement to query the number of files in the restored database, and the size of these files. After restoration, the files will be placed on that disk.
Restore
Problem:
Confirm Login Name
Security-Login Name: confirm the administrator username prefix xxx/administrator, and confirm whether XXX is the user name of the Local Machine. Sometimes this problem occurs after the user name is changed. Change to
The example in this article describes the workaround for the PHP pdo_mysql connection error Connection failed:sqlstate[hy000] [2002] No such file or directory problem. Share to everyone for your reference. The specific methods are as follows:
Error
To speed up the loading of data, many DBAs prefer to use the load tool for data migration and loading, but the load utility brings us some problems as well, and today focuses on the solution when we encounter problems when we use the Load tool again.
Simple Introduction
ASPs are so simple that many developers don't think about error handling. Error handling can make your application more reasonable. I've seen many commercial Web sites written in ASP, most of them ignoring error handling. Type of
Using PHP as a background run program (such as bulk SMS), executing php,php in CLI mode requires a MySQL loop to perform database processing.
When the MySQL connection flashes, the execution of the loop will fail.
We need to design a method that,
there are several declarative forms of error handling: § If any errors (not notFOUND), set L_error to1to continue execution after:DECLARE CONTINUEHANDLER forSQLEXCEPTIONSETL_error=1§ If any errors occur (not notFOUND), executes rollback and
MySQL Midstream use case Study (note) This is quite straightforward understood.Index:
Cursor Basics Explained
MySQL Loop
The integration code in the book
Cursor Basics ExplainedThe cursor is a bit similar to ResultSet in JDBC,
Mapping MySQL Error Numbers to JDBC SQLState Codes
MySQL Error Number
MySQL Error Name
Legacy (X/open) SQLState
SQL Standard SQLState
1022
Er_dup_key
S1000
23000
Delphi 6 Database connection length mode (SQL Server)Tags: delphi Database2015-08-12 20:59 351 people read Comments (0) favorite reports Classification: Delphi(3)Copyright NOTICE: This article for Bo Master original article, without Bo Master
1.mysql_sqlstateconst char *mysql_sqlstate (MySQL *mysql)DescribeReturns a null-terminated string that contains the SQLSTATE error code for the last error. The error code consists of 5 characters. ' 00000 ' means no error. Its value is specified by
Stored Procedure LearningBefore the article starts, we first give the sample table Allintersection. The examples in this article are in navicate for MySQL.I. Creation and invocation of stored procedures1. Basic syntax and examples:Basic syntax for
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