diff --git a/sql/allstars.sql b/sql/allstars.sql
index 9a2a1c5..0db6742 100644
--- a/sql/allstars.sql
+++ b/sql/allstars.sql
@@ -53,7 +53,7 @@ create table if not exists "allstars" (
 	"year"	text,
 	"gameNum"	text,
 	"team"	text,
-	"GP"	numeric,
+	"GP"	numeric	check ("GP" in (0, 1)),
 	primary key("player","year","gameNum"),
 	foreign key("year","gameNum") references "allstargames"("year","gameNum"),
 	foreign key("player","year","team") references "appearances"("player","year","team")
diff --git a/sql/allstarstartingpos.sql b/sql/allstarstartingpos.sql
index 12086f2..baf86b1 100644
--- a/sql/allstarstartingpos.sql
+++ b/sql/allstarstartingpos.sql
@@ -43,7 +43,7 @@ CREATE TABLE "allstarstartingpos" (
 	"year"	NUMERIC,
 	"gameNum"	NUMERIC,
 	"league"	NUMERIC,
-	"startingPos"	NUMERIC,
+	"startingPos"	NUMERIC	check ("startingPos" in (1,2,3,4,5,6,7,8,9,10)),
 	primary key("year","gameNum","league","startingPos"),
 	unique("year","gameNum","league","startingPos"),
 	foreign key("player","year","gameNum") references "allstars"("player","year","gameNum"),
diff --git a/sql/awardssharemanagers.sql b/sql/awardssharemanagers.sql
index 68da9c3..89f895a 100644
--- a/sql/awardssharemanagers.sql
+++ b/sql/awardssharemanagers.sql
@@ -8,7 +8,7 @@ CREATE TABLE IF NOT EXISTS "awardssharemanagers" (
 	"year"	NUMERIC,
 	"league"	TEXT,
 	"manager"	TEXT,
-	"pointsWon"	NUMERIC check (pointsWon <= pointsMax),
+	"pointsWon"	NUMERIC	check (pointsWon <= pointsMax),
 	"pointsMax"	NUMERIC,
 	"votesFirst"	NUMERIC,
 	PRIMARY KEY("manager","award","year","league"),
diff --git a/sql/awardsshareplayers.sql b/sql/awardsshareplayers.sql
index ef7837e..b14c34f 100644
--- a/sql/awardsshareplayers.sql
+++ b/sql/awardsshareplayers.sql
@@ -19,7 +19,7 @@ CREATE TABLE IF NOT EXISTS main."awardsshareplayers" (
 	"year"	NUMERIC,
 	"league"	TEXT,
 	"player"	TEXT,
-	"pointsWon"	NUMERIC check (pointsWon <= pointsMax),
+	"pointsWon"	NUMERIC	check (pointsWon <= pointsMax),
 	"pointsMax"	NUMERIC,
 	"votesFirst"	NUMERIC,
 	PRIMARY KEY("award","year","player","league"),
diff --git a/sql/franchises.sql b/sql/franchises.sql
index d0ef528..40a7b08 100644
--- a/sql/franchises.sql
+++ b/sql/franchises.sql
@@ -6,10 +6,14 @@ attach database 'baseball-raw.db' as 'raw';
 create temp table franchises as
 select * from "raw".teamsfranchises;
 
+update franchises
+set active = 'N'
+where active = 'NA';
+
 CREATE TABLE IF NOT EXISTS main."franchises" (
 	"ID"	TEXT,
 	"name"	TEXT,
-	"active"	TEXT,
+	"active"	TEXT	check ("active" in ('Y','N')),
 	"NAassoc"	TEXT,
 	PRIMARY KEY("ID")
 );
diff --git a/sql/halloffame.sql b/sql/halloffame.sql
index 772f09d..7ad7e61 100644
--- a/sql/halloffame.sql
+++ b/sql/halloffame.sql
@@ -23,7 +23,7 @@ CREATE TABLE IF NOT EXISTS main."halloffame" (
 	"year"	NUMERIC,
 	"votedBy"	TEXT,
 	"votes"	NUMERIC,
-	"inducted"	TEXT,
+	"inducted"	TEXT	check ("inducted" in ('Y','N')),
 	"category"	TEXT,
 	PRIMARY KEY("player","year","votedBy")
 	foreign key("player") references "people"("ID"),
diff --git a/sql/halloffamereqs.sql b/sql/halloffamereqs.sql
index 843d323..9c0524a 100644
--- a/sql/halloffamereqs.sql
+++ b/sql/halloffamereqs.sql
@@ -14,11 +14,19 @@ insert into halloffamereqs
 select distinct yearid, votedby, ballots, needed, "needed_note"
 from "raw".halloffame;
 
+update halloffamereqs
+set ballots = null
+where ballots = "";
+
+update halloffamereqs
+set needed = null
+where needed = "";
+
 create table if not exists main."halloffamereqs" (
 	"year"	numeric,
 	"votedBy"	text,
 	"ballots"	numeric,
-	"needed"	numeric,
+	"needed"	numeric	check ("needed" <= "ballots"),
 	"needed_note"	text,
 	primary key("year","votedBy"),
 	foreign key("year") references "seasons"("year")
diff --git a/sql/homegames.sql b/sql/homegames.sql
index 1e60b05..d0d0fd6 100644
--- a/sql/homegames.sql
+++ b/sql/homegames.sql
@@ -20,7 +20,7 @@ CREATE TABLE IF NOT EXISTS main."homegames" (
 	"year"	NUMERIC,
 	"team"	TEXT,
 	"park"	TEXT,
-	"first"	TEXT check(unixepoch("first") <= unixepoch("last")),
+	"first"	TEXT	check(unixepoch("first") <= unixepoch("last")),
 	"last"	TEXT,
 	"games"	NUMERIC,
 	"openings"	NUMERIC,
diff --git a/sql/teamseasons.sql b/sql/teamseasons.sql
index c1cc0be..1450c9c 100644
--- a/sql/teamseasons.sql
+++ b/sql/teamseasons.sql
@@ -14,6 +14,22 @@ update teamseasons
 set teamid = 'PHP'
 where teamid = 'PH4' and franchid = 'PHQ';
 
+update teamseasons
+set divwin = null
+where divwin = '';
+
+update teamseasons
+set wcwin = null
+where wcwin = '';
+
+update teamseasons
+set lgwin = null
+where lgwin = '';
+
+update teamseasons
+set wswin = null
+where wswin = '';
+
 alter table "teamseasons" drop column "franchID";
 
 create table if not exists main."teamseasons" (