T131 also allows recursive views, which are not yet covered on this page.
Tutorial: With — Organize Complex Queries
Product specific forms: cycle…set…to…default, cycle…restrict.
T131, “Recursive query”, is an optional feature in ISO/IEC 9075:2016-2. It first appeared in SQL:1999.0
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SQL:1999, formerly known as SQL3 (Eisenberg, Melton)