PLS-00489: invalid table reference: 'string' must be a column in this expression

PLS-00489: invalid table reference: 'string' must be a column in this expression
Cause: In a query, a select-list item refers to a table in the FROM clause but not to a database column.
Action: Check the spelling of the column names, make sure each column in the select list refers to a table in the FROM clause, then re-execute the query.

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小智 2018-08-30 19:02

PLS-00489：无效的表引用：' string '必须是此表达式中的一列,
.原因：在查询中，选择列表项是指FROM子句中的表，而不是数据库列。,
.操作：检查列名的拼写，确保选择列表中的每个列都引用了FROM子句中的表，然后重新执行查询。,
.

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PLS-00489: invalid table reference: 'string' must be a column in this expression

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