Find non-default collation on columns for all tables in SQL Server

Try this script here:

DECLARE @DatabaseCollation VARCHAR(100)

SELECT 
    @DatabaseCollation = collation_name 
FROM 
    sys.databases
WHERE 
    database_id = DB_ID()

SELECT 
    @DatabaseCollation 'Default database collation'

SELECT 
    t.Name 'Table Name',
    c.name 'Col Name',
    ty.name 'Type Name',
    c.max_length,
    c.collation_name,
    c.is_nullable
FROM 
    sys.columns c 
INNER JOIN 
    sys.tables t ON c.object_id = t.object_id
INNER JOIN 
    sys.types ty ON c.system_type_id = ty.system_type_id    
WHERE 
    t.is_ms_shipped = 0
    AND 
    c.collation_name <> @DatabaseCollation

It checks for the database default collation and then finds any columns that don’t comply with that.