当我运行以下查询
select concat(column1,column2,column3) as concatcolumn from table
我收到一个错误“ ORA-00909:INVALID NUMBER OF ARGUMENTS”
ORA-00909:INVALID NUMBER OF ARGUMENTS
Concat仅接受两个参数。请参阅:http : //docs.oracle.com/cd/B19306_01/server.102/b14200/functions026.htm
使用串联运算符:
select column1 || column2 || column3 ...