Question

我是sql ans ms-access的新手。所以，我有表tab1，列 id, decscription, number 我想创建一个查询，返回没有通用描述和数字的行的ID。理想的输出是this

我试过了

SELECT  id
FROM tab1
GROUP BY  id, description, Number HAVING COUNT(*)=1;

但返回逻辑错误。

Answer 1

如果要返回唯一的行，可以执行以下操作：

angular.module('App', ['ngCookies','ngResource','ui.router'])
.config(function ($stateProvider, $urlRouterProvider) {

$stateProvider
    .state('login', {
        url: '/login',
        templateUrl: "views/login.html",
        data: {
            required: false
        }
    })
    .state('dashboard', {
        url: '/dashboard',
        templateUrl: "views/dashboard.html",
        data: {
            required: true
        }
    });
$urlRouterProvider.otherwise('/login');
})

.run(["$rootScope", "$state", "$location", "authService", "$cookies", "$sessionStorage", function ($rootScope, $state, $location, authService, $cookies, $sessionStorage) {
$rootScope.$on('$stateChangeStart', function (e, toState, toParams, fromState, fromParams) {
    console.log("currentState: ", $state.current);
    console.log("toState is:", toState);

    if (toState.data.required && !$sessionStorage.authuserid) {
        alert("state not authenticated");
        e.preventDefault();
        $state.go('login');
    }
});
}]);

您也可以使用聚合执行此操作。获取select * from tab1 where not exists (select 1 from tab1 as t where tab1.description = t.description and tab1.number = t.number and tab1.id <> t.id );：

id

Answer 2

SELECT  id
FROM tab1
GROUP BY  description, Number HAVING COUNT(*)=1;

Answer 3

你的问题不是很清楚，也许是：

SELECT 
    id, description, Count(*) As Number
FROM 
    tab1
GROUP BY
    id, description

sql查询返回没有公共属性的行

3 个答案: