CODEWITHSUNDEEP
sqlitevb6auto-increment
AngryHacker
AngryHacker

Reputation: 61656

How to return the value of AUTO INCREMENT column in SQLite with VB6

I have a table in SQLite:

CREATE TABLE "EventType" 
(
[EventTypeID] INTEGER PRIMARY KEY, 
[EventTypeName] VARCHAR(50) NOT NULL UNIQUE
);

Since EventTypeID is an integer and a primary key, that automatically makes it an auto-incrementing column, and that works fine.

I'd like to insert a row into the table and get the newly incremented value from VB6.

Dim oRs as Recordset
dim oCmd as new Command

oCmd.ActiveConnection = GetConnection()
oCmd.Source = "insert into EventType (EventTypeName) values ('blah')"
oCmd.Execute

Is there an automatic way to retrieve the newly created EventTypeID without having to issue another query (select max(EventTypeID) from EventType))?

I seem to remember from VB6 days long time ago, that there was a way to do that.

Upvotes: 14

Views: 39209

Answers (6)

Holger
Holger

Reputation: 2662

Since Version 3.35 you can use

Insert Into <yourtable> Default Values Returning <idcolumn>

Run the Insert with ExecuteScalar.

Upvotes: 3

user3237970
user3237970

Reputation: 141

Run this query inside of your code:

SELECT SEQ from sqlite_sequence WHERE name='tablename'

Upvotes: 13

sgarcia
sgarcia

Reputation: 97

If use 

SELECT last_insert_rowid()

returns the last rowid, you can use :

SELECT last_insert_rowid() AS rowid FROM table_name LIMIT 1

for obtain the last rowid for an individual table

Upvotes: -1

Assaf Lavie
Assaf Lavie

Reputation: 76153

You can call SELECT last_insert_rowid() after your insert

Upvotes: 2

bendewey
bendewey

Reputation: 40265

Does SQLite support SCOPE_IDENTITY?

Check out the FAQ. The sqlite3_last_insert_rowid() function will do it. Careful of triggers though

Not tested, but you should be able to send both statements in one call. It's been a while since I wrote any VB6. Also this is not SQL injection safe.

Dim oRs as Recordset
dim sSql as String
sSql = "INSERT INTO EventType (EventTypeName) VALUES ('blah'); SELECT last_insert_rowid() FROM EventType"
oRs.Open sSql oConn

Upvotes: 17

Kyle Cronin
Kyle Cronin

Reputation: 79163

I don't use VB, so I don't know the interface you're using with your database, but, as bendewey said, there is a function in the c API called sqlite3_last_insert_rowid() that will return the primary integer key for the last inserted row, so you could look for a similar function in your interface.

If that doesn't work, you can use the SQLite-specific query:

SELECT last_insert_rowid()

Upvotes: 3

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