SQLServer替换数据中的数字型数据NULL和0为其他字符代替

SELECT ADCD,
ADNM,
case when CAST(PCOUNT AS VARCHAR) ='0' then '/' when CAST(PCOUNT AS VARCHAR) IS NULL then '/' else CAST(PCOUNT AS VARCHAR) end as PCOUNT, 
case when CAST(HTCOUNT AS VARCHAR) ='0' then '/' when CAST(HTCOUNT AS VARCHAR) IS NULL then '/' else CAST(HTCOUNT AS VARCHAR) end as HTCOUNT, 
case when CAST(LDAREA AS VARCHAR) ='0.00' then '/' when CAST(LDAREA AS VARCHAR) IS NULL then '/' else CAST(LDAREA AS VARCHAR) end as LDAREA, 
case when CAST(PLAREA AS VARCHAR) ='0.00' then '/' when CAST(PLAREA AS VARCHAR) IS NULL then '/' else CAST(PLAREA AS VARCHAR) end as PLAREA, 
case when CAST(HOUSE AS VARCHAR) ='0' then '/' when CAST(HOUSE AS VARCHAR) IS NULL then '/' else CAST(HOUSE AS VARCHAR) end as HOUSE, 
PREVTP,
LGTD,
LTTD
 FROM IA_ADC_ADINFO WHERE ADCD LIKE '%%' AND ADNM LIKE '%%' AND PREVTP LIKE '%%'