ALTER TABLE contacts ADD COLUMN IF NOT EXISTS is_opted_out TINYINT(1) DEFAULT 0;
ALTER TABLE leads ADD COLUMN IF NOT EXISTS is_opted_out TINYINT(1) DEFAULT 0;
ALTER TABLE tblcontacts ADD COLUMN IF NOT EXISTS is_opted_out TINYINT(1) DEFAULT 0;
ALTER TABLE tblleads ADD COLUMN IF NOT EXISTS is_opted_out TINYINT(1) DEFAULT 0;
DESCRIBE tblclients;
ALTER TABLE tblclients ADD COLUMN is_opted_out TINYINT(1) DEFAULT 0;
ALTER TABLE tblclients ADD COLUMN opted_out_date DATETIME NULL;