How do you select the first row in PL SQL?

=> 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.

How do you get to the top 1 in Oracle?

SELECT * FROM (SELECT Fname FROM MyTbl ORDER BY Fname ) WHERE rownum = 1; You could also use the analytic functions RANK and/or DENSE_RANK, but ROWNUM is probably the easiest.

How do I print the first row in SQL?

In MySQL you can use you can use limit clause.

1. Microsoft SQL Server => SELECT TOP 10 column FROM table.
2. PostgreSQL and MySQL => SELECT column FROM table LIMIT 10.
3. Oracle => select * from (SELECT column FROM table ) WHERE ROWNUM <= 10 (thanks to stili)
4. Sybase => SET rowcount 10 SELECT column FROM table.

What does a record in PL / SQL mean?

A PL/SQL record is a composite data structure that is a group of related data stored in fields. Each field in the PL/SQL record has its own name and data type. PL/SQL provides three ways to declare a record: table-based record, cursor-based record and programmer-defined records.

How to select the first three records in SQL Server?

The following SQL statement selects the first three records from the “Customers” table, where the country is “Germany” (for SQL Server/MS Access): The following SQL statement shows the equivalent example using the LIMIT clause (for MySQL): The following SQL statement shows the equivalent example using ROWNUM (for Oracle):

How are records stored in collections in PL / SQL?

To look up data that is more complex than single values, you can store PL/SQL records or SQL object types in collections. Nested tables and varrays can also be attributes of object types. PL/SQL nested tables represent sets of values.

How to declare a field in PL / SQL?

The data type of field can be any of the following: Scalar type ( VARCHAR2, NUMBER …). Anchor declaration %TYPE. %ROW type, in this case we have a nested record. PL/SQL collection types. Cursor variable REF CURSOR. Once you define the record type, you can declare a record based on the record type as follows: