last-insert-id

Can I get the LAST INSERT ID() for a compound key in MySQL? Yes. You can't have multiple auto-increment fields in a single table. CREATE TABLE foo ( id1 int(11) NOT NULL auto_increment, id2 int(11) NOT NULL default '0', PRIMARY KEY (id1, id2) ); INSERT INTO foo VALUES (DEFAULT, 2); SELECT LAST_INSERT_ID(); -- returns 1, the value generated for id1 LAST_INSERT_ID() returns the value only for a column declared AUTO_INCREMENT . There's no function to return the value in a compound primary key that wasn't generated by the system. You ought to know that value already, since you just gave it in an

Original example as found in some post According to this post the following SQL statements should give me a vector 1, 2, 2, 2, 2 in the end: require("RMySQL") con <- dbConnect( dbDriver("MySQL"), db="your_db", user="your_user", password="your_pw", host="localhost" ) > con <MySQLConnection:(6640,122)> > dbSendQuery(con, "DROP TABLE IF EXISTS t;") <MySQLResult:(6640,122,0)> > dbSendQuery(con, "CREATE TABLE t (i INT NOT NULL AUTO_INCREMENT PRIMARY KEY);") <MySQLResult:(6640,122,1)> > dbSendQuery(con, "INSERT INTO t VALUES(NULL);") <MySQLResult:(6640,122,2)> > dbGetQuery(con, "SELECT LAST_INSERT

Can somebody explain how works MySQL function LAST_INSERT_ID(). I'm trying to get id of last inserted row in database, but every time get 1. I use mybatis. Example query is : <insert id="insertInto" parameterType="Something" timeout="0"> INSERT INTO something (something) VALUES (#{something}) <selectKey resultType="int"> SELECT LAST_INSERT_ID() </selectKey> </insert> Code: System.out.println("Id : " + id) Output: Id : 1 LAST_INSERT_ID returns the last value implicitly inserted into an AUTO_INCREMENT column in the current session. CREATE TABLE mytable (id INT NOT NULL AUTO_INCREMENT PRIMARY KEY

I am using mysql and facing some problem. I want to retrieve last row that is inserted. << Below are details >> Below is how I created table. create table maxID (myID varchar(4)) I inserted four values in it as below insert into maxID values ('A001') insert into maxID values ('A002') insert into maxID values ('A004') insert into maxID values ('A003') When I execute select myID, last_insert_id() as NewID from maxID , I get output as below myId NewID A001 0 A002 0 A004 0 A003 0 When I tried below code, select myId, last_insert_id() as NewID, @rowid:=@rowid+1 as myrow from maxID, (SELECT @rowid:

I have a query to insert a row into a table, which has a field called ID, which is populated using an AUTO_INCREMENT on the column. I need to get this value for the next bit of functionality, but when I run the following, it always returns 0 even though the actual value is not 0: MySqlCommand comm = connect.CreateCommand(); comm.CommandText = insertInvoice; comm.CommandText += "\'" + invoiceDate.ToString("yyyy:MM:dd hh:mm:ss") + "\', " + bookFee + ", " + adminFee + ", " + totalFee + ", " + customerID + ")"; int id = Convert.ToInt32(comm.ExecuteScalar()); According to my understanding, this