DocumentDB SQL - Trier par clause

Microsoft Azure DocumentDB prend en charge l'interrogation de documents à l'aide de SQL sur des documents JSON. Vous pouvez trier les documents de la collection sur des nombres et des chaînes à l'aide d'une clause ORDER BY dans votre requête. La clause peut inclure un argument ASC / DESC facultatif pour spécifier l'ordre dans lequel les résultats doivent être récupérés.

Nous considérerons les mêmes documents que dans les exemples précédents.

Voici le AndersenFamily document.

{ 
   "id": "AndersenFamily", 
   "lastName": "Andersen", 
	
   "parents": [ 
      { "firstName": "Thomas", "relationship":  "father" }, 
      { "firstName": "Mary Kay", "relationship":  "mother" } 
   ],
   
   "children": [ 
      { 
         "firstName": "Henriette Thaulow", 
         "gender": "female", 
         "grade": 5, 
         "pets": [ { "givenName": "Fluffy", "type":  "Rabbit" } ] 
      } 
   ],
   
   "location": { "state": "WA", "county": "King", "city": "Seattle" }, 
   "isRegistered": true 
}

Voici le SmithFamily document.

{ 
   "id": "SmithFamily", 
	
   "parents": [ 
      { "familyName": "Smith", "givenName": "James" }, 
      { "familyName": "Curtis", "givenName": "Helen" } 
   ],
   
   "children": [ 
      {
         "givenName": "Michelle", 
         "gender": "female", 
         "grade": 1 
      },
		
      { 
         "givenName": "John", 
         "gender": "male", 
         "grade": 7,
			
         "pets": [ 
            { "givenName": "Tweetie", "type": "Bird" } 
         ] 
      } 
   ],
   
   "location": { 
      "state": "NY", 
      "county": "Queens", 
      "city": "Forest Hills" 
   },
   
   "isRegistered": true 
}

Voici le WakefieldFamily document.

{ 
   "id": "WakefieldFamily", 
	
   "parents": [ 
      { "familyName": "Wakefield", "givenName": "Robin" }, 
      { "familyName": "Miller", "givenName": "Ben" } 
   ],
   
   "children": [ 
      { 
         "familyName": "Merriam", 
         "givenName": "Jesse", 
         "gender": "female", 
         "grade": 6,
			
         "pets": [ 
            { "givenName": "Charlie Brown", "type": "Dog" },
            { "givenName": "Tiger", "type": "Cat" }, 
            { "givenName": "Princess", "type": "Cat" } 
         ] 
      },
		
      { 
         "familyName": "Miller", 
         "givenName": "Lisa", 
         "gender": "female", 
         "grade": 3,
			
         "pets": [ 
            { "givenName": "Jake", "type": "Snake" } 
         ] 
      } 
   ],
   
   "location": { "state": "NY", "county": "Manhattan", "city": "NY" }, 
   "isRegistered": false 
}

Jetons un coup d'œil à un exemple simple.

Voici la requête qui contient le mot clé ORDER BY.

SELECT  f.id, f.children[0].givenName,f.children[0].grade  
FROM Families f  
ORDER BY f.children[0].grade

Lorsque la requête ci-dessus est exécutée, elle produit la sortie suivante.

[ 
   { 
      "id": "SmithFamily", 
      "givenName": "Michelle", 
      "grade": 1 
   },
	
   { 
      "id": "AndersenFamily", 
      "grade": 5 
   },
	
   { 
      "id": "WakefieldFamily", 
      "givenName": "Jesse", 
      "grade": 6 
   } 
]

Prenons un autre exemple simple.

Voici la requête qui contient le mot clé ORDER BY et le mot clé facultatif DESC.

SELECT f.id, f.parents[0].familyName 
FROM Families f  
ORDER BY f.parents[0].familyName DESC

Lorsque la requête ci-dessus est exécutée, elle produira la sortie suivante.

[ 
   {
      "id": "WakefieldFamily", 
      "familyName": "Wakefield" 
   },
	
   { 
      "id": "SmithFamily", 
      "familyName": "Smith" 
   },
	
   {
      "id": "AndersenFamily" 
   }
]