动态创建 Oracle 视图失败

[goumaohua]

各位老大，以下语句错在哪里，折腾几个小时了，帮忙看一下，在线等。

declare
SUMMARY_FLAG varchar2(10):='N';
detail_posting_allowed_flag varchar2(10) :='Y';
strWhere varchar2(1000) :=' and segment1 = ''60'' and segment2 >= ''21'' and segment2 <= ''39'' and segment3 >= ''7910'' and segment3 <= ''7990'' and segment4 = ''5501''';
begin
execute immediate 'CREATE OR REPLACE View View_GoumhTest as SELECT CODE_COMBINATION_ID
FROM GL_CODE_COMBINATIONS where WHERE SUMMARY_FLAG = :1 and detail_posting_allowed_flag = :2 :3' using SUMMARY_FLAG,detail_posting_allowed_flag,strWhere;
end ;

[bobfang]

declare
SUMMARY_FLAG varchar2(10):= 'N ';
detail_posting_allowed_flag varchar2(10) := 'Y ';
strWhere varchar2(1000) := ' and segment1 = ' '60 ' ' and segment2 > = ' '21 ' ' and segment2 <= ' '39 ' ' and segment3 > = ' '7910 ' ' and segment3 <= ' '7990 ' ' and segment4 = ' '5501 ' ' ';
begin
execute immediate 'CREATE OR REPLACE View View_GoumhTest as SELECT CODE_COMBINATION_ID
FROM GL_CODE_COMBINATIONS WHERE SUMMARY_FLAG = :1 and detail_posting_allowed_flag = :2 '||strWhere using SUMMARY_FLAG,detail_posting_allowed_flag;
end ;