sql if

Example: [java] package Utils; import java. SQL. connection; import java. SQL. driverManager; import java. SQL. resultSet; import java. SQL. SQLException; import java. SQL. statement; public class DB {private static Connection con = null; private

Registration verification has failed Require_once ' db.php ';Session_Start (); $name = $_post["name"];$mail = $_post["email"];$pwd = $_post["Key"];$pwd 2 = $_post["rekey"];$agreement = $_post["agreement"]; if ($agreement = = "T") {if

public static function Exec_sql_tran ($arr _sql) { $result =true; $con = new mysqli (dbhost,db_user,db_passwd,db_name); $con->autocommit (FALSE); foreach ($arr _sql as $key => $sql) { if (! $con->query ($sql)) { echo $con->error. " /";

Database connectivity is a limited and expensive resource, and database connections affect the performance metrics of the program. The database connection pool is proposed for this problem. The database connection pool is responsible for allocating,

Today wrote the next infinite polar classification below the code posted up to write a bad. Method of classify one Copy Code code as follows: /* Reader: This is written by yourself the method of realizing the infinite pole

In this increasingly virtual world of the Internet, you have to be careful to protect your own data. This article describes the basics of encoding and encrypting some important information, such as passwords, credit card numbers, or even the entire

I. JDBC Related CONCEPTS Introduction 1.1, Database driverHere the concept of driving and usually hear the kind of driving concept is the same, such as the usual purchase of sound card, network card directly plugged into the computer is not

header (' Content-type:text/html;charset=utf-8 ');Encapsulating MySQL Connection databasePhp_mysqlEncapsulating MySQL Connection database php_mysqliEncapsulating MySQL Connection database php_pdoClass db{//Three private altogether//private static

/* $obj =new obj (param ...)$obj->set_charset ()$obj->connect_errno$obj->connect_error$obj->query ()$obj->errno$obj->error$result = $obj->query (); Mysqli_result Object$result->fetch_all ()$result->fetch_array ()$obj->close () */Class Dbmysqlimanage

/**** @author Administrator* MYSQLI_CONNCET () obj* Mysqli_set_charset () bool* Mysqli_query () mixed input bool output result_obj* Mysqli_fetch_array () row* Mysqli_fetch_all () all*/Class dbmysqlimanage{Public $link =null;Public $message;/***

Declare @tablename varchar( -) ,@sql varchar( +) ,@dbname varchar( -)Set @dbname=db_name()DeclareAddcolumn_cusorcursor for SelectName fromsys.tablesOpenAddcolumn_cusorFetch Next fromAddcolumn_cusor into @tablename while(@

Javaweb Learning Summary (33)--using JDBC to make crud One, statement object introduction to DatabaseThe statement object in JDBC is used to send SQL statements to the database, and to complete the additions and deletions of the database, it is only

function Insert_file ($file, $replace = ' ") {Global $Charset;$readfiles =read_file ($file);if ($replace) {$readfiles =str_replace (' $timestamp ', ' $timestamp ', $readfiles);}$detail =explode ("n", $readfiles);$count =count ($detail);for ($j =0;

Rs.Open sql,conn: If SQL is Delete,update,insert, it will return a closed recordset, do not have a rs.close to write at the end of the file Rs.close Multiple recordsets Rs1.open sql1,conn in the middle, and the last to close the recordset: Rs.close

　String sql = @ "SELECT * from T_excel";———————————————— DataTable Star ————————————————DataTable dt = sqlhelper.executedatatable (sql);if (dt. Rows.Count > 0)        {Create a workbookIworkbook workbook = new Hssfworkbook ();Create a tableisheet

Here is an ADO way to connect to Oracle's applet part of the code ...First is the configuration of Oracle, located under the Oracle installation path: Oracle\network\admin\tnsnames.ora file, configure the connection configuration[Plain]View plain

Example:$db=NewMysqli ("localhost", "root", "" "," MyDB ");!Mysqli_connect_error() or die("Connection Failed! ");$sql= "SELECT * from Info,nation where Info.nation=nation.code";$result=$db->query ($sql);if($result){ $attr=$result-Fetch_all ();

In the past few days, I am going to re-learn and sort out the knowledge system. At the same time, I will divide some things into functional modules. So. Mysql operations become the first key point. I wrote a simple mysql operation class to implement

---------- Php debug ----------Server = localhost; DataBase = mysql; UserID = root; PassWord = 123456Resource (5) of type (mysql result) Output completed (1 sec consumed)-Normal Termination Class DBCLS{ // Debug SwitchVar $ debug = true; //

About PDOPDO is a "database access abstraction layer" that is used to unify various databases (MySQL, MSSQL, Oracle, DB2, PostgreSQL ......) Allows you to easily switch between different databases, making porting between databases easy. PDO driver