diff --git a/lib/private/DB/QueryBuilder/QueryBuilder.php b/lib/private/DB/QueryBuilder/QueryBuilder.php
index 8410be7c9d1..66ed88f03c8 100644
--- a/lib/private/DB/QueryBuilder/QueryBuilder.php
+++ b/lib/private/DB/QueryBuilder/QueryBuilder.php
@@ -597,12 +597,16 @@ class QueryBuilder implements IQueryBuilder {
 	 * @param string $alias The table alias used in the constructed query.
 	 *
 	 * @return $this This QueryBuilder instance.
+	 * @since 30.0.0 Alias is no longer supported
 	 */
 	public function delete($delete = null, $alias = null) {
+		if ($alias !== null) {
+			$this->logger->debug('DELETE queries with alias are no longer supported and the provided alias is ignored', ['exception' => new \InvalidArgumentException('Table alias provided for DELETE query')]);
+		}
+
 		$this->type = self::DELETE;
 		$this->queryBuilder->delete(
 			$this->getTableName($delete),
-			$alias
 		);
 
 		return $this;
@@ -623,12 +627,16 @@ class QueryBuilder implements IQueryBuilder {
 	 * @param string $alias The table alias used in the constructed query.
 	 *
 	 * @return $this This QueryBuilder instance.
+	 * @since 30.0.0 Alias is no longer supported
 	 */
 	public function update($update = null, $alias = null) {
+		if ($alias !== null) {
+			$this->logger->debug('UPDATE queries with alias are no longer supported and the provided alias is ignored', ['exception' => new \InvalidArgumentException('Table alias provided for UPDATE query')]);
+		}
+
 		$this->type = self::UPDATE;
 		$this->queryBuilder->update(
 			$this->getTableName($update),
-			$alias
 		);
 
 		return $this;
diff --git a/lib/public/DB/QueryBuilder/IQueryBuilder.php b/lib/public/DB/QueryBuilder/IQueryBuilder.php
index 271771b5aa2..7d9d56a1f90 100644
--- a/lib/public/DB/QueryBuilder/IQueryBuilder.php
+++ b/lib/public/DB/QueryBuilder/IQueryBuilder.php
@@ -391,8 +391,8 @@ interface IQueryBuilder {
 	 *
 	 * <code>
 	 *     $qb = $conn->getQueryBuilder()
-	 *         ->delete('users', 'u')
-	 *         ->where('u.id = :user_id');
+	 *         ->delete('users')
+	 *         ->where('id = :user_id');
 	 *         ->setParameter(':user_id', 1);
 	 * </code>
 	 *
@@ -401,6 +401,7 @@ interface IQueryBuilder {
 	 *
 	 * @return $this This QueryBuilder instance.
 	 * @since 8.2.0
+	 * @since 30.0.0 Alias is no longer supported
 	 *
 	 * @psalm-taint-sink sql $delete
 	 */
@@ -412,9 +413,10 @@ interface IQueryBuilder {
 	 *
 	 * <code>
 	 *     $qb = $conn->getQueryBuilder()
-	 *         ->update('users', 'u')
-	 *         ->set('u.password', md5('password'))
-	 *         ->where('u.id = ?');
+	 *         ->update('users')
+	 *         ->set('email', ':email')
+	 *         ->where('id = :user_id');
+	 *         ->setParameter(':user_id', 1);
 	 * </code>
 	 *
 	 * @param string $update The table whose rows are subject to the update.
@@ -422,6 +424,7 @@ interface IQueryBuilder {
 	 *
 	 * @return $this This QueryBuilder instance.
 	 * @since 8.2.0
+	 * @since 30.0.0 Alias is no longer supported
 	 *
 	 * @psalm-taint-sink sql $update
 	 */