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SQLite - Database Query
Lv.5756@mukitaro16 playsDec 31, 2025
SQLite prepared statement with parameter binding. Demonstrates safe database queries in C.
preview.c
1#include <sqlite3.h>2#include <stdio.h>3 4int query_users(sqlite3 *db)5{6 sqlite3_stmt *stmt;7 const char *sql = "SELECT id, name, email FROM users WHERE active = ?";8 int rc;9 10 rc = sqlite3_prepare_v2(db, sql, -1, &stmt, NULL);11 if (rc != SQLITE_OK) {12 fprintf(stderr, "Failed to prepare: %s\n", sqlite3_errmsg(db));13 return rc;14 }15 16 sqlite3_bind_int(stmt, 1, 1);17 18 while ((rc = sqlite3_step(stmt)) == SQLITE_ROW) {19 int id = sqlite3_column_int(stmt, 0);20 const char *name = (const char *)sqlite3_column_text(stmt, 1);21 const char *email = (const char *)sqlite3_column_text(stmt, 2);22 printf("User %d: %s <%s>\n", id, name, email);23 }24 25 sqlite3_finalize(stmt);26 return SQLITE_OK;27}Custom problems are not included in rankings