Question

I want to make it able in my app to insert data to sqlite database, and if the id for example is exist so to update this row.

i done the create with :

    if (sqlite3_open([path UTF8String], &database) == SQLITE_OK) {
            sqlite3_stmt *insertStmt = nil;

            if(insertStmt == nil) 
            {
                const char *insertSql = "INSERT INTO Category (id,name) VALUES(?,?)";
                if(sqlite3_prepare_v2(database, insertSql, -1, &insertStmt, NULL) != SQLITE_OK)
                    NSAssert1(0, @"Error while creating insert statement. '%s'", sqlite3_errmsg(database));
            }

            sqlite3_bind_int(insertStmt, 1, 135);
            sqlite3_bind_text(insertStmt, 2, [@"fds" UTF8String], -1, SQLITE_TRANSIENT);

            if(SQLITE_DONE != sqlite3_step(insertStmt))
                NSAssert1(0, @"Error while inserting data. '%s'", sqlite3_errmsg(database));
            else
                //NSLog("Inserted");
            //Reset the add statement.
            sqlite3_reset(insertStmt);
            insertStmt = nil;
        }
        sqlite3_close(database);

Answer 1

Use the OR REPLACE qualifier:

INSERT OR REPLACE INTO Category ...

This relies on the existence of a UNIQUE constraint (usually the primary key) containing just the id column.