PostgreSQL 9.4: UNNEST() WITH ORDINALITY to generate String Array Sequence Number

PostgreSQL 9.4 introduced WITH ORDINALITY for generating a sequence number for each element which are produced by UNNEST().

When we are talking about the string array, internal element numbering is also important for further operation.

I have prepared a small demonstration of this, you can access here.

Create a table with sample data:


The Result:

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