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postgresql - When do Postgres column or table names need quotes and when don't they?
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postgresql - Do I need a primary key for my table, which has a UNIQUE (composite 4-columns), one of which can be NULL?
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postgresql - How to fix "ERROR: column c.relhasoids does not exist" in Postgres?
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postgresql - Storing json, jsonb, hstore, xml, enum, ipaddr, etc fails with "column "x" is of type json but expression is of type character varying"
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