SQLite with swift , i can't get all elements from my table query - xcode

Question

I'm new in swift and SQLLite , I had a problem and I didn't know how to fix it
I create table contain [id name Grade] and this is my insert function
let insertStatementString = "INSERT INTO Contact (Id, Name, Grade ) VALUES (?, ?, ?);"
func insert() {
var insertStatement: COpaquePointer = nil
// 1
if sqlite3_prepare_v2(db, insertStatementString, -1, &insertStatement, nil) == SQLITE_OK {
let dic: [NSString] = ["Ray", "Chris", "Martha", "Danielle"]
let grade = [11 , 13 ,11 ,12]
var id = Int32()
for (index, name) in dic.enumerate() {
sqlite3_bind_int(insertStatement, 1, index + 1)
sqlite3_bind_text(insertStatement, 2, name.UTF8String, -1, nil)
sqlite3_bind_int(insertStatement, 3,Int32(grade[index]))
id = id + 1
}
if sqlite3_step(insertStatement) == SQLITE_DONE {
print("Successfully inserted row.")
} else {
print("Could not insert row.")
}
} else {
print("INSERT statement could not be prepared.")
}
// 5
sqlite3_finalize(insertStatement)
}
insert()
when i call my query function , the while loop work for one time only , but as you can see i had 4 elements in my table
this is my query function
let queryStatementString = "SELECT * FROM Contact;"
func query() {
var queryStatement: COpaquePointer = nil
if sqlite3_prepare_v2(db, queryStatementString, -1, &queryStatement, nil) == SQLITE_OK {
while (sqlite3_step(queryStatement) == SQLITE_ROW) {
let id = sqlite3_column_int(queryStatement, 0)
let queryResultCol1 = sqlite3_column_text(queryStatement, 1)
let grade = sqlite3_column_int(queryStatement, 2)
let name = String.fromCString(UnsafePointer<CChar>(queryResultCol1))!
print("Query Result:")
print("\(id) | \(name) | \(grade)")
}
} else {
print("SELECT statement could not be prepared")
}
sqlite3_finalize(queryStatement)
}
query()
last thing , this my create Table function
let db = openDatabase()
let createTableString = "CREATE TABLE Contact(" + "Id INT PRIMARY KEY NOT NULL," + "Name CHAR(255)," + "Grade INTEGER)"
func createTable() {
var createTableStatement: COpaquePointer = nil
if sqlite3_prepare_v2(db, createTableString, -1, &createTableStatement, nil) == SQLITE_OK {
if sqlite3_step(createTableStatement) == SQLITE_DONE {
print("Contact table created.")
} else {
print("Contact table could not be created.")
}
} else {
print("CREATE TABLE statement could not be prepared.")
}
sqlite3_finalize(createTableStatement)
}
createTable()

Answer 1

In your insert() function, you call sqlite3_step() once. This is why you insert a single row. Move the call to sqlite3_step() inside your loop on names and grades. Also call sqlite3_reset() before setting bindings.