如何在创建动态查询时使用union

Question

我试图通过在动态查询中使用union来查询来自3个差异表的数据，但是当我这样做时，我没有得到任何编译错误，但是我得到以下错误：

  

ORA-00933：SQL命令未正确结束   ORA-06512：在“XXXXXXXX”，第38行

以下是代码：

[1] pry(main)> Customer = Struct.new(:mula, :alu, :lorem)
=> Customer
[2] pry(main)> a = Customer.new('khao', 'khamu na', 'You can use the PrettyPrint standard library included in Ruby.')
=> #<struct Customer mula="khao", alu="khamu na", lorem="You can use the PrettyPrint standard library included in Ruby.">
[3] pry(main)> pp a
#<struct Customer
 mula="khao",
 alu="khamu na",
 lorem="You can use the PrettyPrint standard library included in Ruby.">
=> #<struct Customer mula="khao", alu="khamu na", lorem="You can use the PrettyPrint standard library included in Ruby.">
[4] pry(main)>

另外，如果我在动态查询中只使用1个select语句，那么它可以工作。

Answer 1

以下是示例代码，我认为您需要检查您的sql是否正确生成

JPA Repository