What is the difference between join and lookup in Informatica?
A joiner is used to join data from different sources. lookup is used to get related values from another table or check for updates etc in the target table. It may be we can perform outer join only. Lookup used to source as well as the target.
What is the default SQL JOIN?
The simplest and most common form of a join is the SQL inner join the default of the SQL join types used in most database management systems. It’s the default SQL join you get when you use the join keyword by itself.
Which join is used in lookup transformation in SSIS?
equi-join
The Lookup transformation tries to perform an equi-join between values in the transformation input and values in the reference dataset. (An equi-join means that each row in the transformation input must match at least one row from the reference dataset.)
What is the default join in Informatica?
Normal Join: The Normal Join in Informatica is exactly similar to SQL Inner Join. It returns the records (or rows) present in both tables If there is at least one match between columns. Let us see the visual representation of the Normal Join for better understanding.
Which is faster join or lookup?
In case of Flat file, generally, sorted joiner is more effective than lookup, because sorted joiner uses join conditions and caches less rows. In case of database, lookup can be effective if the database can return sorted data fast and the amount of data is small, because lookup can create whole cache in memory.
Is lookup transformation active or passive?
When you configure the Lookup transformation to return a single row, the Lookup transformation is a passive transformation. When you configure the Lookup transformation to return multiple rows, the Lookup transformation is an active transformation. You can use multiple Lookup transformations in a mapping.
Is join left or inner?
Different Types of SQL JOINs (INNER) JOIN : Returns records that have matching values in both tables. LEFT (OUTER) JOIN : Returns all records from the left table, and the matched records from the right table.
Is lookup a left outer join?
The default join type of lookup transformation is left-outer join in informatica.. considering your source is the left table..
What is the default join of source qualifier?
Inner equi join.
What is master join?
18-06-2021 28-01-2016 by suresh. The Master Outer Join in Informatica is used to return all the existing records from Details table and only matching records from Master table. Let us see the visual representation of the Master Outer Join in Informatica for better understanding.