What to learn when you start with a DSLR camera
Okay so you bought a digital SLR camera and a kilo or 2 of lenses and got all geared up. Now the real fun and learning starts. Here are some…
PostgreSQL: “ERROR: duplicate key violates unique constraint “reference_pkey””
I have been playing with POSTGRESQL and Java a bit and ran into the following problem, and I asked the following on the postgresql mailing list:--------------I have the follow SQL…