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PostgreSQL Multiple Row Insert Methods

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Basic INSERT Syntax: Multiple rows can be inserted using comma-separated values in VALUES clause
INSERT INTO statement returns OID (primary key) and successful row count
Maximum 1000 rows can be inserted in a single statement
Advanced Features: RETURNING clause allows displaying inserted row information
ON CONFLICT clause enables UPSERT (update-insert) functionality
IF NOT EXISTS option available using UPSERT with DO NOTHING action
Nested SELECT queries can be used for inserting rows not present
Limitations: Cannot insert rows from arrays due to homogenous data structure
Column lists in SELECT and INSERT statements must match
INSERT INTO statement must be executed multiple times for large data