diff --git a/src/Query/MsSQL/Offset.php b/src/Query/MsSQL/Offset.php
index dfb5770..3f9432c 100644
--- a/src/Query/MsSQL/Offset.php
+++ b/src/Query/MsSQL/Offset.php
@@ -8,7 +8,7 @@ class Offset extends \Ulmus\Query\Fragment {
     
     public int $order = 95;
 
-    public int $offset;
+    public int $offset = 0;
     
     public int $limit;
 
diff --git a/src/Repository.php b/src/Repository.php
index 11433fa..f1a619e 100644
--- a/src/Repository.php
+++ b/src/Repository.php
@@ -399,7 +399,7 @@ class Repository
 
     public function update(string $table, string $alias, ? string $schema) : self
     {
-        $this->queryBuilder->update($this->escapeTable($table), $this->escapeIdentifier($alias), $this->escapedDatabase(), $schema);
+        $this->queryBuilder->update($this->escapeTable($table), $alias ? $this->escapeIdentifier($alias) : null, $this->escapedDatabase(), $schema);
 
         return $this;
     }
@@ -423,13 +423,14 @@ class Repository
 
     public function from(string $table, ? string $alias, ? string $schema) : self
     {
-        $this->queryBuilder->from($this->escapeTable($table), $this->escapeIdentifier($alias), $this->escapedDatabase(), $schema ? $this->escapeSchema($schema) : null);
+        $this->queryBuilder->from($this->escapeTable($table), $alias ? $this->escapeIdentifier($alias) : null, $this->escapedDatabase(), $schema ? $this->escapeSchema($schema) : null);
+        
         return $this;
     }
 
     public function join(string $type, $table, $field, $value, ? string $alias = null, ? callable $callback = null) : self
     {
-        $join = $this->queryBuilder->withJoin($type, $this->escapeTable($table), $field, $value, false, $this->escapeIdentifier($alias));
+        $join = $this->queryBuilder->withJoin($type, $this->escapeTable($table), $field, $value, false, $alias ? $this->escapeIdentifier($alias) : null);
 
         if ( $callback ) {
             $callback($join);
@@ -440,7 +441,7 @@ class Repository
 
     public function outerJoin(string $type, $table, $field, $value, ? string $alias = null, ? callable $callback = null) : self
     {
-        $join = $this->queryBuilder->withJoin($type, $this->escapeTable($table), $field, $value, true, $this->escapeIdentifier($alias));
+        $join = $this->queryBuilder->withJoin($type, $this->escapeTable($table), $field, $value, true, $alias ? $this->escapeIdentifier($alias) : null);
 
         if ( $callback ) {
             $callback($join);