Best way to get the ID of the last inserted row on SQLite

问题

On iPhone, what's the best way to get the ID of the last inserted row on an SQLite Database using FMDB ?

Is there a better way rather than doing :

SELECT MAX(ID)

回答1:

If you can guarantee that your ID column is an auto-increment column, MAX(ID) is fine.

But to cover any case, there's a specialized SQLite function called LAST_INSERT_ROWID():

SELECT LAST_INSERT_ROWID();

In FMDB, you use the -lastInsertRowId method (which internally runs the above):

int lastId = [fmdb lastInsertRowId];

回答2:

The function sqlite3_last_insert_rowid() is what you're looking for. Having just checked out the source code for FMDB, there seems to be a method on FMDatabase called -lastInsertRowId that wraps the function.

回答3:

Try the following:

var rowid: Int = Int(contactDB.lastInsertRowId())

回答4:

For swift 4 use this code

let lastRowId = sqlite3_last_insert_rowid(db)

for example

if sqlite3_exec(db, stringSql, nil, nil, nil) != SQLITE_OK {
    let errmsg = String(cString: sqlite3_errmsg(db)!)
    print("error Insert: \(errmsg)")
}

let lastRowId = sqlite3_last_insert_rowid(db);
print(lastRowId) // its gives you last insert id

if sqlite3_finalize(statement) != SQLITE_OK {
    let errmsg = String(cString: sqlite3_errmsg(db)!)
    print("error finalizing prepared statement: \(errmsg)")
}
statement = nil

//*** close data base
if sqlite3_close(db) != SQLITE_OK {
    print("error closing database")
}
db = nil

来源：https://stackoverflow.com/questions/5867404/best-way-to-get-the-id-of-the-last-inserted-row-on-sqlite

标签

ios

sql

objective-c

sqlite

fmdb