Oracle PL/SQL查询无法编译

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问题描述

有人可以告诉我为什么它不能编译吗?我收到缺少表达式"错误:

Can anyone tell me why this won't compile? I get a 'missing expression' error:

execute immediate  'select CASE WHEN EXISTS ( SELECT 1 from samples where samplecode = :samplecode  and auditflag = 0 and ' || varFilterString || ') then 1 else 0 end  from DUAL'
into varResult
using varSampleCode;

假设所有变量都正确声明.

Assume the variables are all correctly declared.

TIA

推荐答案

execute immediate  'select  count(1) from DUAL
                      where EXISTS
                       ( SELECT 1 from samples
                        where samplecode = :sample code
                          and auditflag = 0
                          and ' || varFilterString || ')'
into varResult
using varSampleCode;

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