where

问题 I do have some courses, to which students can enroll. There's a users table (usuarios), a courses (cursos) table and a third table that shows each student enrollment (cursosUsuarios), like this: CREATE TABLE usuarios( userID int unsigned not null auto_increment primary key, userName char(50) null, )ENGINE=InnoDB DEFAULT CHARSET=utf8; CREATE TABLE cursos ( cursoID int unsigned not null auto_increment primary key, nombreCurso char(100) not null, estadoCurso char(50) not null, )ENGINE=InnoDB

问题 I do have some courses, to which students can enroll. There's a users table (usuarios), a courses (cursos) table and a third table that shows each student enrollment (cursosUsuarios), like this: CREATE TABLE usuarios( userID int unsigned not null auto_increment primary key, userName char(50) null, )ENGINE=InnoDB DEFAULT CHARSET=utf8; CREATE TABLE cursos ( cursoID int unsigned not null auto_increment primary key, nombreCurso char(100) not null, estadoCurso char(50) not null, )ENGINE=InnoDB

问题 Let me give example: I have some generic class/interface definition: interface IGenericCar< T > {...} I have another class/interface that I want to relate with class above, for example: interface IGarrage< TCar > : where TCar: IGenericCar< (**any type here**) > {...} Basically, I want my generic IGarrage to be dependent on IGenericCar , regardless if it's IGenericCar<int> or IGenericCar<System.Color> , because I don't have any dependency to that type. 回答1: There are typically 2 ways to

问题 I have this code and it works great, if I just want to search by office name. However I need to be able to search by "Office and/or First Name and/or Last Name", any combination of the three. $firstName = $_POST["firstName"]; $lastName = $_POST["lastName"]; $officeName = $_POST ["officeName"]; $query = "SELECT e.*, e.id emp_id, o.* "; $query .= "FROM employee_data e, office o, employee_office_pivot p "; $query .= "WHERE 1=1 AND e.id=p.employee_id AND p.office_id=o.id AND o.office_name= '".

问题 I have a table products and a table tags which both have these fields: id | name 1 | chair 2 | table And a linking table product_tags: id | productId | tagId 1 | 1 | 1 2 | 1 | 2 3 | 2 | 1 4 | 2 | 2 5 | 2 | 3 6 | 2 | 4 Products are displayed in a search result and can be narrowed down if the user ticks some of the tags. Therefore I need to have a query that returns the list of products that have all of the selected tags in product_tags. For example in my tables above if the user had ticked

问题 it seems that it does not work, when I'm using "with" and function inside it and later trying to use "has" function. Here's the code, it should be easier to understand: $users = Users::where("active","=", "1")->with(['photos' => function($q){ $q->where('type','!=', 2); }])->has('photos', '>', 3)->paginate(8); } It seems, that it should return user ONLY if he has 3 photos which are NOT of type 2. But it doesn't care about "where" clause and return it without checking to the type. How can I

问题 it seems that it does not work, when I'm using "with" and function inside it and later trying to use "has" function. Here's the code, it should be easier to understand: $users = Users::where("active","=", "1")->with(['photos' => function($q){ $q->where('type','!=', 2); }])->has('photos', '>', 3)->paginate(8); } It seems, that it should return user ONLY if he has 3 photos which are NOT of type 2. But it doesn't care about "where" clause and return it without checking to the type. How can I

问题 This question already has answers here : “CASE” statement within “WHERE” clause in SQL Server 2008 (11 answers) Closed 2 years ago . I am trying to add case statement to where condition in a query. My query looks like below- select * from table_name where if(id==1) then col1 = 0 else col1 is null As shown in above query I want to add col1 = 0 in where condition if id-==0 else I want col1 is null in where condition. I tried select * from table_name where case id =1 then (col1 = 0) else col1 is

问题 I have function and my function works good only I do not understand this: <?php // $category output is 23 when I echo $category; and there is no records ->where('d.category_id = ' . (int) $category) // also this method not work ->where('d.category_id = ' . $category) // but this method works ->where('d.category_id = 23') ?> this is full code: $category = $params->get('title'); //echo $category; public static function getSuggested($category) { $db = JFactory::getDBO(); $query = $db->getQuery

问题 I migrated a website's database from MySQL 5.0.95 to MySQL 5.1.59 When i try to do a search i get different results for example: When i search for "MTH" on the old database i get one result, but when i search on the new database for "MTH" i do not get any results However when i do a search for "accountents" i DO get the SAME results with both databases!?! so only some words shows different results, not all I narrowed it down to the "match" function from mysql. Anyone who has had the same