Explain how an insert/update is parsed in Oracle database

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Accepted Answer

An insert/update statement in Oracle database is parsed by the SQL parser to check syntax and semantics.

The SQL parser first checks the syntax of the insert/update statement to ensure it follows the rules of the SQL language.
Next, the parser checks the semantics of the statement, which involves verifying the existence and accessibility of the tables and columns referenced in the statement.
During parsing, the parser also determines the execution plan for the statement, which includes identifying the tables involved, the access methods, and any necessary joins or filters.
The parsed statement is then passed to the optimizer, which generates the most efficient execution plan based on statistics and other factors.
Finally, the execution plan is executed by the Oracle database to perform the actual insert/update operation.

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