#XPTY0004

ORA-19279: XPTY0004 – XQuery dynamic type mismatch: expected singleton sequence – got multi-item sequence

文档解释ORA-19279:XPTY0004–XQuerydynamictypemismatch:expectedsingletonsequence–gotmulti-itemsequenceCause:TheXQuerysequencepassedinhadmorethanoneitem.Ac...