[英]How to restrict only 1 row to get updated in postgres?
I am trying to convert the below Oracle sql to postgres sql:我正在尝试将以下 Oracle sql 转换为 postgres sql:
Update Table_name set flag='U' WHERE id= 1 and ROWNUM < 2.
if the data in the table is some thing like如果表中的数据类似于
Then the query should update only one record as Unique like flag='U'.. and other records should not be effected.然后查询应该只将一条记录更新为 Unique like flag='U'.. 并且其他记录不应该受到影响。
Note:There is no unique key nor primary key on the table.注意:表上没有唯一键和主键。 I don't have access rights to create a constraint.
我没有创建约束的访问权限。
Since ROWNUM is not available in postgres, I am not able to do convert this query into postgres.由于 ROWNUM 在 postgres 中不可用,我无法将此查询转换为 postgres。
Thanks in advance..提前致谢..
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