asp.net - Trying to get SELECT SCOPE_IDENTITY() as c# variable -

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i inserting row 1 table want new id can add in variable have email address stored. 

 var db = database.open("mydb");  var insertcommand1 = "insert mydb (firstname, lastname) values(@0, @1)";                         db.execute(insertcommand1, first, last);  var lastinsertedid = db.queryvalue("select scope_identity()");   var insertcommand2 = "insert email (id_person, email) values(@0, @1)";  db.execute(insertcommand2, lastinsertid, email);

where id_person id created in first table. when run code lastinsertedid = {}. reason why not grabbing value id_person primary key, int , not null first table? --tim

from the documentation of scope_identity(), emphasis mine:

returns last identity value inserted identity column in same scope. scope module: stored procedure, trigger, function, or batch. therefore, 2 statements in same scope if in same stored procedure, function, or batch.

because using 2 queries considered 2 batches. need insert , select in single query.

i don't know library using, guessing on syntax beleive need like

 var db = database.open("mydb");  var insertcommand1 = "insert mydb (firstname, lastname) values(@0, @1); " +                       "select scope_identity()";  var lastinsertedid = db.queryvalue(insertcommand1, first, last);   var insertcommand2 = "insert email (id_person, email) values(@0, @1)";  db.execute(insertcommand2, lastinsertid, email);

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