mongodb-driver-c
<div id="codeText" class="codeText"><ol style="margin: 0pt 1px 0pt 0pt; padding: 5px 0pt;" start="1" class="dp-css"><li>sql:</li><li> select age from user where name = "tim";</li><li>mongodb:<br></li><li> db.user.find({name:"tim"},{age:1,_id:0});</li><li>mongodb的c api:</li><li> bson query</li><li> bson_init(&query)</li><li> bson_append_string(&query, "name", "tim");</li><li> bson_finish(&query)</li></ol> bson field;<br> bson_init(&field);<br> bson_append_int(&field, "age", 1);<br> bson_append_int(&field, "_id", 0);<br> bson_finish(&field);<br><ol style="margin:0 1px 0 0;padding:5px 0;" start="1" class="dp-css"><li> mongo_find(conn, ns, &query, &field, 0, 0, 0);<br></li></ol></div>
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