ALTER TABLE [Database].[schema].[table] ADD [CONSTRAINT] PK_schema_table PRIMARY KEY CLUSTERED ([ID]); It appears to be assuming the first item after "ADD" is a column name/identifier, like it would ...

mysql> ALTER TABLE `UserRoleCompanie` ADD COLUMN `companieId` char(25) CHARACTER SET utf8 NOT NULL; Query OK, 0 rows affected (0.32 sec) Records: 0 Duplicates: 0 Warnings: 0 mysql> ALTER TABLE ...