>I have some code that are removing a primary key from all my tables. However, if this primary key does not exist, this will stop the script once reached. I need to verify if the primary key exists first before attempting to remove it. I have this presently:
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>ALTER TABLE [MyTable] DROP CONSTRAINT Numero
>

Try

USE
SELECT Table_Name as [Table], Column_Name as [Column],
Constraint_Name as [Constraint], Table_Schema as [Schema]
FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE
ORDER BY [Table], [Column]