Please help me to slove this SQL statements - Mailing list pgsql-sql

From Freshman
Subject Please help me to slove this SQL statements
Date
Msg-id bnr0nj$1173$1@news.hub.org
Whole thread Raw
List pgsql-sql
There are three table in database which is suppliers, projects, and
shipments
suppliers contain suppliers id, name ...etc
projects contain project name ..suppliers ID ( J1---J7) ...etc
shipments table contain suppliers ID , PROJECTS ID

how can i query to find out the suppliers to supply all the projects ID




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