prepared-statement

问题 I have a backup utility, workig on restore section. This is my table: CREATE TABLE "SBOOKS"."DEV_CORPUS" ( "CORPUSID" NUMBER(9,0) NOT NULL ENABLE, "CORPUS_NAME" VARCHAR2(768 BYTE) NOT NULL ENABLE, "CORPUSLASTSYNC" DATE, PRIMARY KEY ("CORPUSID") In restore class I would like to look for a primary key in table, if it exists then update the row, if not then insert a row. now the problem is I need to pass the parameters from the class (they do not exist in any table), how can I do this? what is

问题 This is my first post here. I've searched in the site, but inforutunaly no matchs. Anyway, i want to know how to use named parameters on a class. so the pdo basic form is something like. $query = $bdd->prepare('SELECT * FROM table WHERE login = :login AND pww = :pww'); $query->execute(array('login' => $login, 'pww' => $pww)); and i want to integrate this on a class regardless of the number of parameters. Currently, i have this code http://pastebin.com/kKgSkaKt and for parameters, i use

问题 Code: // get value of id that sent from address bar $id=filter_input(INPUT_GET, 'id', FILTER_VALIDATE_INT); if ($id === false) { //filter failed die('id not a number'); } if ($id === null) { //variable was not set die('id not set'); } //white list table $safe_tbl_name = ''; switch($tbl_name){ case 'Table1': $safe_tbl_name = 'MyTable1'; break; case 'Table2': $safe_tbl_name = 'MyTable2'; break; default: $safe_tbl_name = 'forum_questions'; }; $sql="SELECT * FROM `$safe_tbl_name` WHERE id=?"; if

问题 I have a file containing several SQL statements that I'd like to use to initialize a new sqlite3 database file. Apparently, sqlite3 only handles multiple statements in one query via the sqlite3_exec() function, and not through the prepare/step/finalize functions. That's all fine, but I'd like to use the QtSQL api rather than the c api directly. Loading in the same initializer file via QSqlQuery only executes the first statement, just like directly using the prepare/step/finalize functions

问题 Is there a way to use MySQLi prepared statements without passing references? [Background: I'm extremely new to PHP and to MySQL but I inherited a private WordPress plugin to maintain and so I'm learning both as I go.] I understand that prepared statements are useful for preventing SQL injections and potentially also for speeding up queries (if the statements are kept around) but the need for referenced variables seems odd. Is the idea that one calls bind_param up front and then when making

问题 I need to insert a string defined in Javascript into an MSSQL table. This is what I have so far: Javascript: var message = "It's a great day today!"; $.post('www.server.com/message='+message, function(response){ console.log(response); }); Node.js Server: //..... a bunch of code has been used to accept the HTTP request and get the message... // for the purpose of this example, the message is asigned to 'NodeMsg' var mssqldb = require("../core/mssql"); var NodeMsg =

问题 I read about it in the internet but I am not able to get answer for some queries. Q1. It is said that when the PreparedStatement is executed, the DBMS can just run the PreparedStatement SQL statement without having to compile it first. My question is when preparedStetement.execute() is called what happens? (My understanding: The sql without any parameter is sent to DBMS which is compiled & cached by the DBMS for future use. Then the parameters are sent & DBMS replace them with the place

问题 In one server setup I experience very strange error. There's PHP 5.3.6 with PDO Driver for MySQL, client library version 5.1.61. Everything is compiled by hand. When I bind params with bindValue and set third parameter as \PDO::PARAM_BOOL then statement execute return false and nothing happens (no data inserted to MySQL, even no exception at all). When I don't use third parameter it goes well. In fact I can't ommit third parameter, bacues Doctrine2 DBAL sets it while converting parameters...

问题 I use query: select LAST_LOAD_TIME, ELAPSED_TIME, MODULE, SQL_TEXT elasped from v$sql WHERE MODULE='JDBC Thin Client' ORDER BY LAST_LOAD_TIME DESC elasped: delete from tableA where fk in (select pk from tableB where tableB.fk=:1 and tableB.date between :2 and :3) Is it possible find these parameters 1, 2 and 3? 回答1: Something like this: select s.sql_id, bc.position, bc.value_string, s.last_load_time, bc.last_captured from v$sql s left join v$sql_bind_capture bc on bc.sql_id = s.sql_id and bc

问题 I use query: select LAST_LOAD_TIME, ELAPSED_TIME, MODULE, SQL_TEXT elasped from v$sql WHERE MODULE='JDBC Thin Client' ORDER BY LAST_LOAD_TIME DESC elasped: delete from tableA where fk in (select pk from tableB where tableB.fk=:1 and tableB.date between :2 and :3) Is it possible find these parameters 1, 2 and 3? 回答1: Something like this: select s.sql_id, bc.position, bc.value_string, s.last_load_time, bc.last_captured from v$sql s left join v$sql_bind_capture bc on bc.sql_id = s.sql_id and bc