Implement an in-memory databasewqa

pkg/ramdb/README.md

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+# ramdb
+
+RamDB is an implementation of an in-memory database with a simple API for selecting and querying the database. It uses b-trees as the underlying storage mechanism which allows fast searches and mutations.
+
+All database commands are safe for concurrent operations.
+
+## Example
+
+```go
+// Create database and table.
+db := ramdb.NewDatabase()
+_ = db.CreateTable("hotdogs", "frank_id")
+
+// Mm, hotdogs.
+type HotDog struct {
+	FrankId string
+	Condiments []string
+	Brat bool
+}
+
+indog := HotDog{
+	FrankId: "1",
+	Condiments: []string{
+		"kraut",
+		"mustard",
+	},
+	Brat: true,
+}
+
+// Create a new record and insert.
+rec, _ := ramdb.NewRecord("1", "frank_id", indog)
+_ = db.From("hotdogs").Insert(rec)
+
+
+// Query data out.
+ro, _ := db.From("hotdogs").Get("frank_id", "1")
+
+var outdog HotDog
+_ = ro.Deserialize(&outdog)
+
+fmt.Printf("%+v\n", outdog)
+
+// &HotDog{"1" ["kraut", "mustard"] true}
+```