Add some 2nf transformations

Makefile

@@ -4,7 +4,7 @@ bbdb = baseballdatabank-2023.1
 
 db: baseball.db
 
-baseball.db: sql/corrections/*.sql sql/keys/*.sql sql/1nf/*.sql
+baseball.db: sql/corrections/*.sql sql/keys/*.sql sql/1nf/*.sql sql/2nf/*.sql
 	rm -f baseball.db
 	sqlite3 baseball.db ".import --csv $(bbdb)/core/AllstarFull.csv allstarfull"
 	sqlite3 baseball.db ".import --csv $(bbdb)/core/Appearances.csv appearances"
@@ -36,4 +36,5 @@ baseball.db: sql/corrections/*.sql sql/keys/*.sql sql/1nf/*.sql
 	cat sql/corrections/*.sql | sqlite3 baseball.db
 	cat sql/keys/*.sql | sqlite3 baseball.db
 	cat sql/1nf/*.sql | sqlite3 baseball.db
+	cat sql/2nf/*.sql | sqlite3 baseball.db
 	sqlite3 baseball.db "VACUUM"

sql/2nf/appearances.sql

@@ -0,0 +1,3 @@
+begin;
+alter table "appearances" drop column "lgID";
+commit;

sql/2nf/appearancespost.sql

@@ -0,0 +1,21 @@
+begin;
+create table if not exists appearancespost (
+	"yearID"	numeric,
+	"playerID"	text,
+	"teamID"	text,
+	primary key("yearID","playerID")
+);
+
+insert into appearancespost
+select distinct yearID, playerID, teamID
+from battingpost
+union
+select distinct yearID, playerID, teamID
+from pitchingpost;
+
+alter table "battingpost" drop column "teamID";
+alter table "battingpost" drop column "lgID";
+
+alter table "pitchingpost" drop column "teamID";
+alter table "pitchingpost" drop column "lgID";
+commit;

sql/2nf/homegames.sql

@@ -0,0 +1,3 @@
+begin;
+alter table "homegames" drop column "league.key";
+commit;

sql/2nf/salaries.sql

@@ -0,0 +1,3 @@
+begin;
+alter table "salaries" drop column "lgID";
+commit;

sql/2nf/seriespost.sql

@@ -0,0 +1,4 @@
+begin;
+alter table "seriespost" drop column "lgIDwinner";
+alter table "seriespost" drop column "lgIDloser";
+commit;

sql/2nf/teamshalfdivision.sql

@@ -0,0 +1,15 @@
+begin;
+create table if not exists "teamshalfdivisions" (
+	"yearID"	numeric,
+	"teamID"	text,
+	"divID"	text,
+	primary key("yearID","teamID")
+);
+
+insert into teamshalfdivisions
+select distinct yearid, teamid, divid
+from teamshalf;
+
+alter table teamshalf drop column "lgID";
+alter table teamshalf drop column "divID";
+commit;