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  • Guru: SELECT INTO And Arrays

    March 8, 2021 Ted Holt

    I got egg on my face again. I told a couple of colleagues that they could use the SELECT INTO statement to load multiple rows into an array data structure in an RPG program. Boy, was I wrong! I had confused SELECT INTO with the FETCH statement, of course, which retrieves data over which a cursor has been declared.

    But the matter continued to nag me. I much like the simplicity of SELECT INTO. There’s no cursor to declare, open, fetch from and close, the same reason I like the FOR loop in SQL PL. It seemed (and continues …

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  • Guru: Scalar Use of LISTAGG

    August 24, 2020 Ted Holt

    The SQL LISTAGG function is as handy as a pocket. Only recently I used it to build a string of comma-separated values (CSV) to populate a drop-down box. It sure beats a cursor and a loop. I’ve noticed in my reading that LISTAGG can be used for both aggregate and scalar purposes under Oracle. Db2 doesn’t support the scalar use, but I found another way to do the same thing.

    To see what I’m talking about, check out example 7 in the article Oracle LISTAGG Function Usage, Tips & Examples, by Ben Brumm. I recommend studying the entire article; …

    Read more

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