diff --git a/src/commands/pull.ts b/src/commands/pull.ts
index 34a95f2..8229ffd 100644
--- a/src/commands/pull.ts
+++ b/src/commands/pull.ts
@@ -34,7 +34,6 @@ export default class Pull {
   /**
    * Spinner instance.
    */
-  // tslint:disable-next-line:typedef
   private spinner = ora();
 
   /**
diff --git a/src/commands/push.ts b/src/commands/push.ts
index 0640652..687a662 100644
--- a/src/commands/push.ts
+++ b/src/commands/push.ts
@@ -16,7 +16,6 @@ export default class Push {
   /**
    * Spinner instance.
    */
-  // tslint:disable-next-line:typedef
   private spinner = ora();
 
   /**
diff --git a/src/generators/mssql.ts b/src/generators/mssql.ts
index e1a5e23..54493e5 100644
--- a/src/generators/mssql.ts
+++ b/src/generators/mssql.ts
@@ -225,10 +225,6 @@ export default class MSSQLGenerator {
       output += EOL;
     });
 
-    if (foreignKeys.length && indexes.length) {
-      output += EOL;
-    }
-
     const groupedIndexes = this.groupByName(indexes);
     Object.keys(groupedIndexes).forEach(name => {
       output += this.index(groupedIndexes[name]);
@@ -440,7 +436,7 @@ export default class MSSQLGenerator {
         break;
     }
 
-    if (item.collation_name) {
+    if (item.collation_name && !item.is_user_defined) {
       output += ` COLLATE ${item.collation_name}`;
     }
 
@@ -518,10 +514,16 @@ export default class MSSQLGenerator {
    */
   private foreignKey(item: SqlForeignKey): string {
     const objectId = `[${item.schema}].[${item.table}]`;
+    const keyObjectId = `[${item.schema}].[${item.name}]`;
     const parentObjectId = `[${item.parent_schema}].[${item.parent_table}]`;
     let output = '';
 
-    output += `ALTER TABLE ${objectId} WITH ${item.is_not_trusted ? 'NOCHECK' : 'CHECK'}`;
+    output += `IF NOT EXISTS (SELECT 1 FROM sys.foreign_keys WHERE object_id = OBJECT_ID('${keyObjectId}') AND parent_object_id = OBJECT_ID('${objectId}'))`;
+    output += EOL;
+    output += 'BEGIN';
+    output += EOL;
+
+    output += this.indent() + `ALTER TABLE ${objectId} WITH ${item.is_not_trusted ? 'NOCHECK' : 'CHECK'}`;
     output += ` ADD CONSTRAINT [${item.name}] FOREIGN KEY ([${item.column}])`;
     output += ` REFERENCES ${parentObjectId} ([${item.reference}])`;
 
@@ -550,7 +552,10 @@ export default class MSSQLGenerator {
     }
 
     output += EOL;
-    output += `ALTER TABLE ${objectId} CHECK CONSTRAINT [${item.name}]`;
+    output += this.indent() + `ALTER TABLE ${objectId} CHECK CONSTRAINT [${item.name}]`;
+    output += EOL;
+    output += 'END';
+    output += EOL;
 
     return output;
   }
diff --git a/src/queries/interfaces.ts b/src/queries/interfaces.ts
index 4652a5e..d1d5f50 100644
--- a/src/queries/interfaces.ts
+++ b/src/queries/interfaces.ts
@@ -46,6 +46,7 @@ export interface SqlColumn {
   object_id: number;
   name: string;
   datatype: string;
+  is_user_defined: boolean;
   max_length: number;
   is_computed: boolean;
   precision: number;
diff --git a/src/queries/mssql.ts b/src/queries/mssql.ts
index d2f3900..4c11c62 100644
--- a/src/queries/mssql.ts
+++ b/src/queries/mssql.ts
@@ -36,6 +36,7 @@ export const columnsRead = `
     c.object_id,
     c.name,
     tp.name AS [datatype],
+    tp.is_user_defined,
     c.max_length,
     c.is_computed,
     c.precision,
@@ -96,7 +97,7 @@ export const foreignKeysRead = `
     c.name AS [column],
     rc.name AS [reference],
     fk.name,
-    SCHEMA_NAME(ro.schema_id) AS [schema],
+    SCHEMA_NAME(po.schema_id) AS [schema],
     po.name AS [table],
     SCHEMA_NAME(ro.schema_id) AS [parent_schema],
     ro.name AS [parent_table],
diff --git a/test/appveyor-cache.json b/test/appveyor-cache.json
index d5a08d2..9a0d480 100644
--- a/test/appveyor-cache.json
+++ b/test/appveyor-cache.json
@@ -60,74 +60,74 @@
     "./_sql-database/tables/dbo.AWBuildVersion.sql": "29c80eba0303f1a759266e3cf4c5b330bf28bb7b",
     "./_sql-database/tables/dbo.DatabaseLog.sql": "9b20616aecea60d1132431f20dce0fde9afb31de",
     "./_sql-database/tables/dbo.ErrorLog.sql": "6c739cf6b1b1aa3961fe170e7d0a0ae923231dc6",
-    "./_sql-database/tables/HumanResources.Department.sql": "16e8a95f3380f90090c9e96ff5b408868305b6b5",
-    "./_sql-database/tables/HumanResources.Employee.sql": "9dba9bd03b686e6a2b0bf70f19daa45c3b4ca2ef",
-    "./_sql-database/tables/HumanResources.EmployeeDepartmentHistory.sql": "388d78e65b87d5f9de6074c549c381601d907b98",
-    "./_sql-database/tables/HumanResources.EmployeePayHistory.sql": "6509eac69c98d9a66aa6af0a1e53cd39f677a7fb",
-    "./_sql-database/tables/HumanResources.JobCandidate.sql": "9a346d58c5c8f29b4894e4a1e8d58f962be01bb2",
-    "./_sql-database/tables/HumanResources.Shift.sql": "f1953aeb0ae3de120d344d759c220dc6362180d6",
-    "./_sql-database/tables/Person.Address.sql": "28533f6e3d2ffe3c2b58f37b95b82b30df485b0a",
-    "./_sql-database/tables/Person.AddressType.sql": "0cc5fcebeadd8d09ee9ee357f35ab1937cc8dfab",
+    "./_sql-database/tables/HumanResources.Department.sql": "4bf0595e675d1c71d990a77fc33d68c396b0d241",
+    "./_sql-database/tables/HumanResources.Employee.sql": "efb72f408a7abffb1f530000d5dcf5a2ff975df6",
+    "./_sql-database/tables/HumanResources.EmployeeDepartmentHistory.sql": "384b0a3693eb66806a70443811915a52e5139821",
+    "./_sql-database/tables/HumanResources.EmployeePayHistory.sql": "e678293368b54c34b83cfbdd5ed3dbedc44abbe8",
+    "./_sql-database/tables/HumanResources.JobCandidate.sql": "dd7d9e12a1ae830f413c842bbde6722060272232",
+    "./_sql-database/tables/HumanResources.Shift.sql": "5412bee432ceac402b6fd77c6ecf87aa625bb38f",
+    "./_sql-database/tables/Person.Address.sql": "68680d701dff19b65fef954f220a8533b307404b",
+    "./_sql-database/tables/Person.AddressType.sql": "8e5a5bfbf1e131930b4140e13093f24def40241a",
     "./_sql-database/tables/Person.BusinessEntity.sql": "974a196e5c5b127d95e7f85f24ac45e04117684a",
-    "./_sql-database/tables/Person.BusinessEntityAddress.sql": "d19d65c68026e7636409feb863278ddd98032538",
-    "./_sql-database/tables/Person.BusinessEntityContact.sql": "d340af0c1ef314f52675fc15258e89019ed9d0f3",
-    "./_sql-database/tables/Person.ContactType.sql": "c68b1b6e52beba70915e1800a1f5e4b8f8072311",
-    "./_sql-database/tables/Person.CountryRegion.sql": "b750353ffb7364461bd3c6c582cfb7cceb115a8e",
-    "./_sql-database/tables/Person.EmailAddress.sql": "9aa73683fb5f17bd59b3ed1745015f8d58061c65",
-    "./_sql-database/tables/Person.Password.sql": "ae070f1dfe70f94c64eb741b4b995a21165b7a02",
-    "./_sql-database/tables/Person.Person.sql": "26266d0e4ce5274b944a446b87f413e149bb5182",
-    "./_sql-database/tables/Person.PersonPhone.sql": "44e096956c3ddbda62fc3624c7e4134058c3c16d",
-    "./_sql-database/tables/Person.PhoneNumberType.sql": "b8a44911f6b6a15640ae5e5ce94649789057fb82",
-    "./_sql-database/tables/Person.StateProvince.sql": "6d6a771dd3efc03e2176763af93210be56a3e1f2",
-    "./_sql-database/tables/Production.BillOfMaterials.sql": "5ba81e841cbed8a4d084a6a4ed5d2294558d1bd8",
-    "./_sql-database/tables/Production.Culture.sql": "53427c04a478c3cd72950285861086be014e735b",
-    "./_sql-database/tables/Production.Document.sql": "8b258dc4e3dfda4d353a829c18b176ee94522792",
+    "./_sql-database/tables/Person.BusinessEntityAddress.sql": "b8f0dc95ff96356fd546f88027be3ec2549694a5",
+    "./_sql-database/tables/Person.BusinessEntityContact.sql": "db00db36a8c305369614ccc5b928e8597e3b1cc2",
+    "./_sql-database/tables/Person.ContactType.sql": "ae76fd3b5a19761acd6957cc95ef81b23bbc0458",
+    "./_sql-database/tables/Person.CountryRegion.sql": "6dcb67e6e55ec55854090e164562551a42eb0880",
+    "./_sql-database/tables/Person.EmailAddress.sql": "e94818c21608b6c16059debc16f29a09befe0f99",
+    "./_sql-database/tables/Person.Password.sql": "a41a0ec2d9436debe18d14814320d64039a6571f",
+    "./_sql-database/tables/Person.Person.sql": "adfd8437559df08805009a01a639406d7a06c614",
+    "./_sql-database/tables/Person.PersonPhone.sql": "aa5de40c666f70eecfc40a3067bfe01de5c8e123",
+    "./_sql-database/tables/Person.PhoneNumberType.sql": "b3f1927d41efef70d3163b872248fe10d59a2836",
+    "./_sql-database/tables/Person.StateProvince.sql": "7282919a39b919cf793bd7d5ddbc20a817aa418d",
+    "./_sql-database/tables/Production.BillOfMaterials.sql": "306c49bee053c831da96204ff2a5b7e0873b8f08",
+    "./_sql-database/tables/Production.Culture.sql": "669198dedd761006eab9c95d4c2787b81af382e7",
+    "./_sql-database/tables/Production.Document.sql": "4661d248da6edf9c8225398f3450e79eb35531ee",
     "./_sql-database/tables/Production.Illustration.sql": "b52688b6f9683af379664a18d369ec37aa0a876b",
-    "./_sql-database/tables/Production.Location.sql": "e1f2ff0c307dff2f685331c31283ee9b34031c19",
-    "./_sql-database/tables/Production.Product.sql": "15cd2ad22366b1bf4c84454674399c0582903fac",
-    "./_sql-database/tables/Production.ProductCategory.sql": "030ed0a6766dc8092fba72ecffe23497c2c010a6",
-    "./_sql-database/tables/Production.ProductCostHistory.sql": "7f7612e7ce5b899e8cab43be6e04dd6cd428e819",
+    "./_sql-database/tables/Production.Location.sql": "3925e29b56e538ac8a809e628e10bf131e88c510",
+    "./_sql-database/tables/Production.Product.sql": "6772a934c8b90450de2593cff0cf08f29badd71f",
+    "./_sql-database/tables/Production.ProductCategory.sql": "fa70876299e8516c069f23fd487020382bb492dc",
+    "./_sql-database/tables/Production.ProductCostHistory.sql": "2f000a5d847fd588eb0e2731959497c116fe1766",
     "./_sql-database/tables/Production.ProductDescription.sql": "53200ad11d1c00bb4c5aba33084a19f5d926610a",
-    "./_sql-database/tables/Production.ProductDocument.sql": "f13f01454d737929b928e3b522039c4e54edc61f",
-    "./_sql-database/tables/Production.ProductInventory.sql": "a4442cd1f38f63445f3cd3c86476e22761186c57",
-    "./_sql-database/tables/Production.ProductListPriceHistory.sql": "302e55ad539e07e3ec0fc6342919ba69d140a94e",
-    "./_sql-database/tables/Production.ProductModel.sql": "48a030d42ab5eb3366fd5a5df3e7a953df67d947",
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-    "./_sql-database/tables/Production.ProductModelProductDescriptionCulture.sql": "847f155dd3fa587622b72460c1bc9eb63c347f3d",
+    "./_sql-database/tables/Production.ProductDocument.sql": "0bc9e98df535489220831e319911a3e91f37af84",
+    "./_sql-database/tables/Production.ProductInventory.sql": "7b7dd3eb81441b115f7dbd3653184b22d2884977",
+    "./_sql-database/tables/Production.ProductListPriceHistory.sql": "43a187a7830aecc7cac2c66679f65b0408812bd7",
+    "./_sql-database/tables/Production.ProductModel.sql": "45044e688a4df4b4145ef29b143ecacc0002d530",
+    "./_sql-database/tables/Production.ProductModelIllustration.sql": "a0fc4231412400c3778340c9bf591d3ef34bf9ad",
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     "./_sql-database/tables/Production.ProductPhoto.sql": "d7b72993e64484f44bb8932ed4e80a353cff329a",
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-    "./_sql-database/tables/Production.TransactionHistory.sql": "d6e701ada56716b459fa8e2951f679dc2a9a8b5b",
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     "./_sql-database/tables/Production.TransactionHistoryArchive.sql": "bfc3780f6a06bccb1855e0f80e95528729a1452a",
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-    "./_sql-database/tables/Sales.CountryRegionCurrency.sql": "1ba8a44b19e5c32758d13c52966f844486fe7a99",
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     "./_sql-database/tables/Sales.CreditCard.sql": "f4af312a986ea206311b2cfaa53594be33932cb1",
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-    "./_sql-database/tables/Sales.ShoppingCartItem.sql": "ce1244b5f8939f831890faa9a24d56c5ea6e4991",
+    "./_sql-database/tables/Sales.Currency.sql": "fabf07099843b49440dcd19d8ba9ed1076c8f388",
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-    "./_sql-database/tables/Sales.Store.sql": "618ef5a705beb8f46a0368ac1b41a7f08af9be1b",
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