How to select only 1 row from oracle sql

Question

I want to use oracle syntax to select only 1 row from table DUAL   For example  I want to execute this query   SELECT user    FROM DUAL      and it d have  like  40 records   But I need only one record      AND  I want to make it happen without a WHERE clause   I need something in the table name field such as   SELECT FirstRow user     FROM DUAL

User · Answer

More flexible than select max   is   select distinct first row column x  over  order by column y column z      from Table A

User · Answer

The answer is   You should use nested query as   SELECT   FROM ANY TABLE X  WHERE ANY COLUMN X    SELECT MAX ANY COLUMN X  FROM ANY TABLE X        In PL SQL  ROWNUM   1  is NOT equal to  TOP 1  of TSQL   So you can t use a query like this   select   from any table x where rownum 1 order by any column x   Because oracle gets first row then applies order by clause

User · Answer

FirstRow  Is a restriction and therefor it s place in the where clause not in the select clause  And it s called rownum  select   from dual where rownum   1

User · Answer

This syntax is available in Oracle 12c   select   from some table fetch first 1 row only  select   from some table fetch first 1 rows only  select   from some table fetch first 10 row only  select   from some table fetch first 10 rows only      I just wanted to demonstrate that either row or rows  plural  can be used regardless of the plurality of the desired number of rows

User · Answer

As far as I know  the dual table in Oracle is a special table with just one row  So  this would suffice   SELECT user FROM dual

User · Answer

You use ROWNUM   ie    SELECT user FROM Dual WHERE ROWNUM   1   http   docs oracle com cd B19306 01 server 102 b14200 pseudocolumns009 htm

User · Answer

If any row would do  try   select max user    from table    No where clause

User · Answer

select name  price   from       select name  price       row number   over  order by price  r       from items     where r between 1 and 5

User · Answer

I found this  solution  hidden in one of the comments  Since I was looking it up for a while  I d like to highlight it a bit  can t yet comment or do such stuff      so this is what I used   SELECT   FROM  SELECT  Column  FROM  Table  ORDER BY  Date  DESC  WHERE ROWNUM   1   This will print me the desired  Column  entry from the newest entry in the table  assuming that  Date  is always inserted via SYSDATE

User · Answer

There is no limit 1 condition  thats MySQL   PostgresSQL  in Oracle  you need to specify where rownum   1

User · Answer

we have 3 choices to get the first row in Oracle DB table   1  select   from table name where rownum  1 is the best way    2  select   from table name where id     select min id  from table name   3    select   from       select   from table name order by id  where rownum   1

User · Answer

If you want to get back only the first row of a sorted result with the least subqueries  try this  select     from   select a                   row number   over   order by sysdate col desc   as row num            from table name a     where row num   1

User · Answer

select a user from  select user from users order by user  a where rownum   1   will perform the best  another option is   select a user  from    select user   row number   over  order by user  user rank   row number   over  partition by dept order by user  user dept rank  from users    a  where a user rank   1 or user dept rank   2   in scenarios where you want different subsets  but I guess you could also use RANK   But  I also like row number   over      since no grouping is required

[sql] How to select only 1 row from oracle sql?

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