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News From the CYBERTEC Blog
PostgreSQL zheap: Current status
zheap has been designed as a new storage engine to handle UPDATE in PostgreSQL more efficiently. A lot has happened since my last report on this important topic, and I thought it would make sense to give readers a bit of a status update – to see how things are going, and what the current […]
PostgreSQL: LIMIT vs FETCH FIRST ROWS … WITH TIES
Most people in the SQL and in the PostgreSQL community have used the LIMIT clause provided by many database engines. However, what many do not know is that LIMIT / OFFSET are off standard and are thus not portable. The proper way to handle LIMIT is basically to use SELECT … FETCH FIRST ROWS. However, […]
Understanding LATERAL joins in PostgreSQL
LATERAL joins are one of the lesser-known features of PostgreSQL and other relational databases such as Oracle, DB2 and MS SQL. However, LATERAL joins are a really useful feature, and it makes sense to take a look at what you can accomplish with them. Inspecting FROM more closely Before we dive into LATERAL, it makes […]