ORACLE
Oracle doesn’t recognize the ’Limit’ command, however, there is any easy way to achieve the same result. Using the Oracle/function in the ‘where’ clause.
ROWNUM Pseudo Column Description
The Oracle/PLSQL ROWNUM pseudo column returns a number that represents the order that a row is selected by Oracle from a table or joined tables. The first row has a ROWNUM of 1, the second has a ROWNUM of 2, and so on.
Basic RUWNUM Syntax
SELECT column_name(s)
FROM Schema.table_name
WHERE ROWNUM <= number
Order by column_name(s);
Example SQL Limiting to One row
The one row limit has two accurate way to get the desired result:
· SQL Limiting to One row using equal to
SELECT RSNBL_CODE,
MVNG_AVG1_PRD
FROM Blog.SCP_FCST_CONTROL
where rownum = 1;
· SQL Limiting to One row using less than or equal to
SELECT RSNBL_CODE,
MVNG_AVG1_PRD
FROM Blog.SCP_FCST_CONTROL
where rownum <= 1;
Oracle Rownum Limited to One Row
Example SQL Limiting to multiple rows
SELECT RSNBL_CODE,
MVNG_AVG1_PRD
FROM Blog.SCP_FCST_CONTROL
where rownum <= 10;
Oracle Rownum Limited to Multiple Rows