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= PGRES_TUPLES_OK) int rows = PQntuples(res); for(int i=0; i The program takes a row Id as its argument.It fetches the data of the specified row and prints it.Postgre SQL has sophisticated features such as Multi-Version Concurrency Control (MVCC), point in time recovery, tablespaces, asynchronous replication, nested transactions (savepoints), online/hot backups, a sophisticated query planner/optimizer, and write ahead logging for fault tolerance.It supports international character sets, multibyte character encodings, Unicode, and it is locale-aware for sorting, case-sensitivity, and formatting.We are going to install Postgre SQL database and the C development library.

If we are only learning to work with the database, it is unnecessary to start the database each time we boot the system.When making connections to the database, no password is required. For GNU C compiler, we need to add the -std=c99 option.(The restrictions made in the database and user columns still apply.) The trust authentication is appropriate and very convenient for local connections on a single-user workstation. For Windows users, the Pelles C IDE is highly recommended.Since the program takes a value from a user, which cannot be trusted, we must sanitize the input data.A prepared statement is created with a function creates a prepared statement and executes it. The third parameter is the number of parameters passed.

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The following belongs to metadata: information about the tables and columns in which we store data, the number of rows affected by an SQL statement, or the number of rows and columns returned in a result set. void do_exit(PGconn *conn) int main() { PGconn *conn = PQconnectdb("user=janbodnar dbname=testdb"); if (PQstatus(conn) == CONNECTION_BAD) PGresult *res = PQexec(conn, "SELECT * FROM Cars WHERE Id=0"); if (PQresult Status(res) !

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