diff --git a/src/db.ts b/src/db.ts
index fc9262c..bc3cb92 100644
--- a/src/db.ts
+++ b/src/db.ts
@@ -16,7 +16,7 @@ export class DB {
         this.name = database;
     }
     async query(query: Query) {
-        console.log(query);
+        //console.log(query);
         return await this.pool.query(query);
     }
     getHandler() {
@@ -41,6 +41,9 @@ export class DB {
         for (let i = 0; i < this.tables.length; i++) if (this.tables[i].dbLangTableName == name) return this.tables[i];
         return null;
     }
+    async close() {
+        if (this.pool) await this.pool.end();
+    }
 }
 
 export class Attribute {
@@ -69,7 +72,7 @@ export class Attribute {
         }
         if (ops.foreginKey != null) {
             table.addConstraint(new foreignConstraint(
-                table.dbLangDatabaseInstance.name + "_" + table.dbLangTableName + "_" + name + "_foreign_constraint_to_"+ops.foreginKey.link.name,
+                table.dbLangDatabaseInstance.name + "_" + table.dbLangTableName + "_" + name + "_foreign_constraint_to_" + ops.foreginKey.link.name,
                 [this],
                 [ops.foreginKey.link],
                 ops.foreginKey.onDelete,
diff --git a/src/defaultHandler.ts b/src/defaultHandler.ts
index 8102338..450babb 100644
--- a/src/defaultHandler.ts
+++ b/src/defaultHandler.ts
@@ -465,7 +465,6 @@ export class Handler {
         },
     }
 
-
     aggregations = {
         count: (handler: Handler, a: Attribute): QueryBuilder => new QueryBuilder([{ data: "count(" + a.toString(handler) + ")" }]),
         sum: (handler: Handler, a: Attribute): QueryBuilder => new QueryBuilder([{ data: "sum(" + a.toString(handler) + ")" }]),
@@ -524,6 +523,7 @@ export class Handler {
             return builder;
         }
     }
+    
     datatypes = {
         char: dataTypeSingleNum("char"),
         varchar: dataTypeSingleNum("varchar"),
diff --git a/src/funcs.ts b/src/funcs.ts
index d9e9dee..870d2d0 100644
--- a/src/funcs.ts
+++ b/src/funcs.ts
@@ -1,5 +1,5 @@
 import { Attribute } from "./db";
-import { Aggregation, BooleanModifier, checkConstraint, Datatype, NumberModifier } from "./dbStructure";
+import { Aggregation, BooleanModifier, checkConstraint, Datatype, foreignConstraint, NumberModifier, uniqueConstraint } from "./dbStructure";
 import { selectQuery } from "./query";
 import { allModifierInput, primaryData, selectElements, selectFromElements } from "./types";
 
@@ -71,8 +71,13 @@ export const YEAR = new Datatype("year", []);
 // Constraints
 //TODO:
 //primary key
-export const foreginKey = (attrs: Attribute[], target: Attribute[]) => { };
-export const uniqueKey = (attr: Attribute[]) => { };
+export const foreignKey = (attrs: Attribute[], target: Attribute[]) => new foreignConstraint(
+    "foreign_constraint_"
+    + attrs.map(a => a.name + "_" + a.table.dbLangTableName).join("_")
+    + "_to_"
+    + target.map(a => a.name + "_" + a.table.dbLangTableName).join("_"), 
+    attrs, target);
+export const uniqueKey = (attrs: Attribute[]) => new uniqueConstraint("unique_constraint_" + attrs.map(a => a.name + "_" + a.table.dbLangTableName).join("_"), attrs);
 export const check = (name: string, mod: BooleanModifier) => new checkConstraint(name, mod);