SQL to mongo Shell to C++

INSERT INTO USERS
VALUES( 1, 1)

db.users.insert( { a: 1, b: 1 } )

// GENOID is optional. if not done by client,
// server will add an _id

c.insert("mydb.users",
BSON(GENOID<<"a"<<1<<"b"<<1));
// then:
string err = c.getLastError();

SELECT a,b FROM users

db.users.find( {},
{a: 1, b: 1 }
)

auto_ptr<DBClientCursor> cursor =
c.query("mydb.users", Query(),
0, 0, BSON("a"<<1<<"b"<<1));

SELECT * FROM users

db.users.find()

auto_ptr<DBClientCursor> cursor =
c.query("mydb.users", Query());

SELECT *
FROM users
WHERE age=33

db.users.find( { age: 33 } )

auto_ptr<DBClientCursor> cursor =
c.query("mydb.users", QUERY("age"<<33))
// or:
auto_ptr<DBClientCursor> cursor =
c.query("mydb.users", BSON("age"<<33))

SELECT *
FROM users
WHERE age=33ORDER BY name

db.users.find( { age: 33 } ).sort( { name: 1 } )

auto_ptr<DBClientCursor> cursor =
c.query("mydb.users",
QUERY("age"<<33).sort("name"));

SELECT *
FROM users
WHERE age>33
AND age<=40

db.users.find( { 'age': { $gt:33, $lte:40 } } )

auto_ptr<DBClientCursor> cursor =
c.query("mydb.users",
QUERY("age"<<GT<<33<<LTE<<40));

CREATE INDEX myindexname
ON users(name)

db.users.ensureIndex( {name: 1 } )

c.ensureIndex("mydb.users", BSON("name"<<1));

SELECT *
FROM users
LIMIT 10
SKIP 20

db.users.find().limit(10).skip(20)

auto_ptr<DBClientCursor> cursor =
c.query("mydb.users", Query(),
10, 20);

SELECT * FROM users LIMIT 1

db.users.findOne()

bo obj = c.findOne("mydb.users", Query());

SELECT DISTINCT last_name
FROM users
WHERE x=1

db.users.distinct( 'last_name', {x: 1} )

// no helper for distinct yet in c++ driver,
// so send command manually
bo cmdResult;
bool ok = c.runCommand(
"mydb",
BSON("distinct" << "users"
<< "key" << "last_name"
<< "query" << BSON("x"<<1)),
cmdResult);
list<bo> results;
cmdResult["values"].Obj().Vals(results);

SELECT COUNT(*)
FROM users
where AGE > 30

db.users.find( { age: { $gt: 30 } } ).count()

unsigned long long n =
c.count("mydb.users", BSON("age"<<GT<<30));

UPDATE users
SET a=a+2
WHERE b='q'

db.users.update( { b: 'q' },
{ $inc: { a:2 } },
false, true)

c.update("mydb.users", QUERY("b"<<"q"),
BSON("$inc"<<BSON("a"<<2)), false, true);
// then optionally:
string err = c.getLastError();
bool ok = err.empty();

DELETE
FROM users
WHERE z="abc"

db.users.remove( { z: 'abc' } )

c.remove("mydb.users", QUERY("z"<<"abc"));
// then optionally:
string err = c.getLastError();