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ORA-01422: exact fetch returns more than requested number of rows ORACLE 报错 故障修复 远程处理

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ORA-01422: exact fetch returns more than requested number of rows ORACLE 报错 故障修复 远程处理

文档解释

ORA-01422: exact fetch returns more than requested number of rows

Cause: The number specified in exact fetch is less than the rows returned.

Action: Rewrite the query or change number of rows requested

ORA-01422错误是一个通用错误,表示“精确抓取返回的行数超过指定的数量”。

官方解释

精确提取返回的行数(或变量)超过指定的数量。通常,如果你使用一次SELECT 语句抓取一行,但查询语句返回多行,系统将抛出ORA-01422。

常见案例

ORA-01422常见于使用SELECT INTO … WHERE … 语法,但SQL函数执行后返回多行时,也可能出现此错误。

正常处理方法及步骤

1)检查语句。确保查询语句只返回一行,例如使用LIMIT 1并限制输出列

2)如果一个SQL函数返回多行,则使用集合函数,以便返回单个行。

3)然后,可能需要使用游标分页抓取数据,使用类似于LIMIT/OFFSET的方法,向单个变量或部分变量写入多行数据。

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ORA-01422: exact fetch returns more than requested number of rows ORACLE 报错 故障修复 远程处理

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