根据以下描述我必须CASE...END在SQL服务器中构建一个语句,帮助我构造一个复杂的CASE...END语句来满足以下条件.
if PAT_ENT.SCR_DT is not null and PAT_ENTRY.ELIGIBILITY is null then display display 'Favor'
if PAT_ENT.SCR_DT is not null and PAT_ENTRY.EL is equal to No, display 'Error'
if PAT_ENTRY.EL is Yes and DS.DES is equal to null or OFF, display 'Active'
if DS.DES is equal to N, display 'Early Term'
if DS.DES is equal to Y, display 'Complete'
提前致谢.