Migrating From MySQL To PostgreSQL In PHP

PostgreSQL OIDS

Every row that exists in a PostgreSQL database has an OID column associated with it. When you normally select data from a table (e.g. select * from myTable) you won’t see this field, but try the following and see what you get:

select oid, * from myTable;

Think of this an internal unique ID the database server uses to keep track of your data.

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