[Sobuno]

I take no responsibility for the following piece of code, it is completely untested on real data and you are advised to back up your database before running it:

Fixing the structure of the table:

ALTER TABLE `Player` CHANGE `STEAMID` `STEAMID` varchar(25) NOT  NULL,CHANGE `NAME` `NAME` varchar(30) NOT NULL,CHANGE `POINTS` `POINTS`  int(25) NOT NULL default '0',CHANGE `PLAYTIME` `PLAYTIME` int(25) NOT  NULL default '0',CHANGE `LASTONTIME` `LASTONTIME` int(25) NOT NULL  default '0',CHANGE `KILLS` `KILLS` int(11) NOT NULL default '0',CHANGE  `Death` `Death` int(11) NOT NULL default '0',CHANGE `KillAssist`  `KillAssist` int(11) NOT NULL default '0',CHANGE `KillAssistMedic`  `KillAssistMedic` int(11) NOT NULL default '0',CHANGE `BuildSentrygun`  `BuildSentrygun` int(11) NOT NULL default '0',CHANGE `BuildDispenser`  `BuildDispenser` int(11) NOT NULL default '0',CHANGE `HeadshotKill`  `HeadshotKill` int(11) NOT NULL default '0',CHANGE `KOSentrygun`  `KOSentrygun` int(11) NOT NULL default '0',CHANGE `Domination`  `Domination` int(11) NOT NULL default '0',CHANGE `Overcharge`  `Overcharge` int(11) NOT NULL default '0',CHANGE `KOSapper` `KOSapper`  int(11) NOT NULL default '0',CHANGE `BOTeleporterentrace`  `BOTeleporterentrace` int(11) NOT NULL default '0',CHANGE `KODispenser`  `KODispenser` int(11) NOT NULL default '0',CHANGE `BOTeleporterExit`  `BOTeleporterExit` int(11) NOT NULL default '0',CHANGE `CPBlocked`  `CPBlocked` int(11) NOT NULL default '0',CHANGE `CPCaptured`  `CPCaptured` int(11) NOT NULL default '0',CHANGE `FileCaptured`  `FileCaptured` int(11) NOT NULL default '0',CHANGE `ADCaptured`  `ADCaptured` int(11) NOT NULL default '0',CHANGE `KOTeleporterExit`  `KOTeleporterExit` int(11) NOT NULL default '0',CHANGE  `KOTeleporterEntrace` `KOTeleporterEntrace` int(11) NOT NULL default  '0',CHANGE `BOSapper` `BOSapper` int(11) NOT NULL default '0',CHANGE  `Revenge` `Revenge` int(11) NOT NULL default '0',CHANGE `KW_Axe`  `KW_Axe` int(11) NOT NULL default '0',CHANGE `KW_Bnsw` `KW_Bnsw` int(11)  NOT NULL default '0',CHANGE `KW_Bt` `KW_Bt` int(11) NOT NULL default  '0',CHANGE `KW_Bttl` `KW_Bttl` int(11) NOT NULL default '0',CHANGE  `KW_Cg` `KW_Cg` int(11) NOT NULL default '0',CHANGE `KW_Fsts` `KW_Fsts`  int(11) NOT NULL default '0',CHANGE `KW_Ft` `KW_Ft` int(11) NOT NULL  default '0',CHANGE `KW_Gl` `KW_Gl` int(11) NOT NULL default '0',CHANGE  `KW_Kn` `KW_Kn` int(11) NOT NULL default '0',CHANGE `KW_Mctte`  `KW_Mctte` int(11) NOT NULL default '0',CHANGE `KW_Mgn` `KW_Mgn` int(11)  NOT NULL default '0',CHANGE `KW_Ndl` `KW_Ndl` int(11) NOT NULL default  '0',CHANGE `KW_Pistl` `KW_Pistl` int(11) NOT NULL default '0',CHANGE  `KW_Rkt` `KW_Rkt` int(11) NOT NULL default '0',CHANGE `KW_Sg` `KW_Sg`  int(11) NOT NULL default '0',CHANGE `KW_Sky` `KW_Sky` int(11) NOT NULL  default '0',CHANGE `KW_Smg` `KW_Smg` int(11) NOT NULL default '0',CHANGE  `KW_Spr` `KW_Spr` int(11) NOT NULL default '0',CHANGE `KW_Stgn`  `KW_Stgn` int(11) NOT NULL default '0',CHANGE `KW_Wrnc` `KW_Wrnc`  int(11) NOT NULL default '0',CHANGE `KW_Sntry` `KW_Sntry` int(11) NOT  NULL default '0',CHANGE `KW_Shvl` `KW_Shvl` int(11) NOT NULL default  '0',CHANGE `KW_Ubersaw` `KW_Ubersaw` int(11) NOT NULL default '0',CHANGE  `KW_Flaregun` `KW_Flaregun` int(11) NOT NULL default '0',CHANGE  `KW_Axtinguisher` `KW_Axtinguisher` int(11) NOT NULL default '0',CHANGE  `KW_taunt_pyro` `KW_taunt_pyro` int(11) NOT NULL default '0',CHANGE  `KW_taunt_heavy` `KW_taunt_heavy` int(11) NOT NULL default '0',CHANGE  `KW_gloves` `KW_gloves` int(11) NOT NULL default '0',CHANGE  `KW_backburner` `KW_backburner` int(11) NOT NULL default '0',CHANGE  `KW_natascha` `KW_natascha` int(11) NOT NULL default '0',CHANGE  `KW_blutsauger` `KW_blutsauger` int(11) NOT NULL default '0',CHANGE  `KW_deflect_rocket` `KW_deflect_rocket` int(11) NOT NULL default  '0',CHANGE `KW_deflect_promode` `KW_deflect_promode` int(11) NOT NULL  default '0',CHANGE `KW_deflect_sticky` `KW_deflect_sticky` int(11) NOT  NULL default '0',CHANGE `KW_world` `KW_world` int(11) NOT NULL default  '0',CHANGE `KW_bat_wood` `KW_bat_wood` int(11) NOT NULL default  '0',CHANGE `player_stunned` `player_stunned` int(11) NOT NULL default  '0',CHANGE `drunk_bonk` `drunk_bonk` int(11) NOT NULL default '0',CHANGE  `player_stealsandvich` `player_stealsandvich` int(11) NOT NULL default  '0',CHANGE `chat_status` `chat_status` int(11) NOT NULL default  '0',CHANGE `KW_tf_projectile_arrow` `KW_tf_projectile_arrow` int(11) NOT  NULL default '0',CHANGE `KW_ambassador` `KW_ambassador` int(11) NOT  NULL default '0',CHANGE `KW_taunt_sniper` `KW_taunt_sniper` int(11) NOT  NULL default '0',CHANGE `KW_taunt_spy` `KW_taunt_spy` int(11) NOT NULL  default '0',CHANGE `player_extinguished` `player_extinguished` int(11)  NOT NULL default '0',CHANGE `player_teleported` `player_teleported`  int(11) NOT NULL default '0',CHANGE `player_feigndeath`  `player_feigndeath` int(11) NOT NULL default '0',CHANGE  `KW_force_a_nature` `KW_force_a_nature` int(11) NOT NULL default  '0',CHANGE `KW_sandman` `KW_sandman` int(11) NOT NULL default '0',CHANGE  `K_backstab` `K_backstab` int(11) NOT NULL default '0',CHANGE  `KW_compound_bow` `KW_compound_bow` int(11) NOT NULL default '0',CHANGE  `KW_taunt_scout` `KW_taunt_scout` int(11) NOT NULL default '0',CHANGE  `KW_deflect_arrow` `KW_deflect_arrow` int(11) NOT NULL default  '0',CHANGE `KW_rocketlauncher_directhit` `KW_rocketlauncher_directhit`  int(11) NOT NULL default '0',CHANGE `KW_telefrag` `KW_telefrag` int(11)  NOT NULL default '0',CHANGE `KW_deflect_flare` `KW_deflect_flare`  int(11) NOT NULL default '0',CHANGE `KW_taunt_soldier`  `KW_taunt_soldier` int(11) NOT NULL default '0',CHANGE `KW_pickaxe`  `KW_pickaxe` int(11) NOT NULL default '0',CHANGE `KW_demoshield`  `KW_demoshield` int(11) NOT NULL default '0',CHANGE `KW_sword`  `KW_sword` int(11) NOT NULL default '0',CHANGE `KW_taunt_demoman`  `KW_taunt_demoman` int(11) NOT NULL default '0',CHANGE  `KW_sticky_resistance` `KW_sticky_resistance` int(11) NOT NULL default  '0',CHANGE `KW_jar` `KW_jar` int(11) NOT NULL default '0'

Batch fixing the entries to work in the future (Might not be needed, but I have no data to test with):

UPDATE `Player` SET `STEAMID` =0 WHERE `STEAMID` = NULL; UPDATE `Player`  SET `NAME` =0 WHERE `NAME` = NULL; UPDATE `Player` SET `POINTS` =0  WHERE `POINTS` = NULL; UPDATE `Player` SET `PLAYTIME` =0 WHERE  `PLAYTIME` = NULL; UPDATE `Player` SET `LASTONTIME` =0 WHERE  `LASTONTIME` = NULL; UPDATE `Player` SET `KILLS` =0 WHERE `KILLS` =  NULL; UPDATE `Player` SET `Death` =0 WHERE `Death` = NULL; UPDATE  `Player` SET `KillAssist` =0 WHERE `KillAssist` = NULL; UPDATE `Player`  SET `KillAssistMedic` =0 WHERE `KillAssistMedic` = NULL; UPDATE `Player`  SET `BuildSentrygun` =0 WHERE `BuildSentrygun` = NULL; UPDATE `Player`  SET `BuildDispenser` =0 WHERE `BuildDispenser` = NULL; UPDATE `Player`  SET `HeadshotKill` =0 WHERE `HeadshotKill` = NULL; UPDATE `Player` SET  `KOSentrygun` =0 WHERE `KOSentrygun` = NULL; UPDATE `Player` SET  `Domination` =0 WHERE `Domination` = NULL; UPDATE `Player` SET  `Overcharge` =0 WHERE `Overcharge` = NULL; UPDATE `Player` SET  `KOSapper` =0 WHERE `KOSapper` = NULL; UPDATE `Player` SET  `BOTeleporterentrace` =0 WHERE `BOTeleporterentrace` = NULL; UPDATE  `Player` SET `KODispenser` =0 WHERE `KODispenser` = NULL; UPDATE  `Player` SET `BOTeleporterExit` =0 WHERE `BOTeleporterExit` = NULL;  UPDATE `Player` SET `CPBlocked` =0 WHERE `CPBlocked` = NULL; UPDATE  `Player` SET `CPCaptured` =0 WHERE `CPCaptured` = NULL; UPDATE `Player`  SET `FileCaptured` =0 WHERE `FileCaptured` = NULL; UPDATE `Player` SET  `ADCaptured` =0 WHERE `ADCaptured` = NULL; UPDATE `Player` SET  `KOTeleporterExit` =0 WHERE `KOTeleporterExit` = NULL; UPDATE `Player`  SET `KOTeleporterEntrace` =0 WHERE `KOTeleporterEntrace` = NULL; UPDATE  `Player` SET `BOSapper` =0 WHERE `BOSapper` = NULL; UPDATE `Player` SET  `Revenge` =0 WHERE `Revenge` = NULL; UPDATE `Player` SET `KW_Axe` =0  WHERE `KW_Axe` = NULL; UPDATE `Player` SET `KW_Bnsw` =0 WHERE `KW_Bnsw` =  NULL; UPDATE `Player` SET `KW_Bt` =0 WHERE `KW_Bt` = NULL; UPDATE  `Player` SET `KW_Bttl` =0 WHERE `KW_Bttl` = NULL; UPDATE `Player` SET  `KW_Cg` =0 WHERE `KW_Cg` = NULL; UPDATE `Player` SET `KW_Fsts` =0 WHERE  `KW_Fsts` = NULL; UPDATE `Player` SET `KW_Ft` =0 WHERE `KW_Ft` = NULL;  UPDATE `Player` SET `KW_Gl` =0 WHERE `KW_Gl` = NULL; UPDATE `Player` SET  `KW_Kn` =0 WHERE `KW_Kn` = NULL; UPDATE `Player` SET `KW_Mctte` =0  WHERE `KW_Mctte` = NULL; UPDATE `Player` SET `KW_Mgn` =0 WHERE `KW_Mgn` =  NULL; UPDATE `Player` SET `KW_Ndl` =0 WHERE `KW_Ndl` = NULL; UPDATE  `Player` SET `KW_Pistl` =0 WHERE `KW_Pistl` = NULL; UPDATE `Player` SET  `KW_Rkt` =0 WHERE `KW_Rkt` = NULL; UPDATE `Player` SET `KW_Sg` =0 WHERE  `KW_Sg` = NULL; UPDATE `Player` SET `KW_Sky` =0 WHERE `KW_Sky` = NULL;  UPDATE `Player` SET `KW_Smg` =0 WHERE `KW_Smg` = NULL; UPDATE `Player`  SET `KW_Spr` =0 WHERE `KW_Spr` = NULL; UPDATE `Player` SET `KW_Stgn` =0  WHERE `KW_Stgn` = NULL; UPDATE `Player` SET `KW_Wrnc` =0 WHERE `KW_Wrnc`  = NULL; UPDATE `Player` SET `KW_Sntry` =0 WHERE `KW_Sntry` = NULL;  UPDATE `Player` SET `KW_Shvl` =0 WHERE `KW_Shvl` = NULL; UPDATE `Player`  SET `KW_Ubersaw` =0 WHERE `KW_Ubersaw` = NULL; UPDATE `Player` SET  `KW_Flaregun` =0 WHERE `KW_Flaregun` = NULL; UPDATE `Player` SET  `KW_Axtinguisher` =0 WHERE `KW_Axtinguisher` = NULL; UPDATE `Player` SET  `KW_taunt_pyro` =0 WHERE `KW_taunt_pyro` = NULL; UPDATE `Player` SET  `KW_taunt_heavy` =0 WHERE `KW_taunt_heavy` = NULL; UPDATE `Player` SET  `KW_gloves` =0 WHERE `KW_gloves` = NULL; UPDATE `Player` SET  `KW_backburner` =0 WHERE `KW_backburner` = NULL; UPDATE `Player` SET  `KW_natascha` =0 WHERE `KW_natascha` = NULL; UPDATE `Player` SET  `KW_blutsauger` =0 WHERE `KW_blutsauger` = NULL; UPDATE `Player` SET  `KW_deflect_rocket` =0 WHERE `KW_deflect_rocket` = NULL; UPDATE `Player`  SET `KW_deflect_promode` =0 WHERE `KW_deflect_promode` = NULL; UPDATE  `Player` SET `KW_deflect_sticky` =0 WHERE `KW_deflect_sticky` = NULL;  UPDATE `Player` SET `KW_world` =0 WHERE `KW_world` = NULL; UPDATE  `Player` SET `KW_bat_wood` =0 WHERE `KW_bat_wood` = NULL; UPDATE  `Player` SET `player_stunned` =0 WHERE `player_stunned` = NULL; UPDATE  `Player` SET `drunk_bonk` =0 WHERE `drunk_bonk` = NULL; UPDATE `Player`  SET `player_stealsandvich` =0 WHERE `player_stealsandvich` = NULL;  UPDATE `Player` SET `chat_status` =0 WHERE `chat_status` = NULL; UPDATE  `Player` SET `KW_tf_projectile_arrow` =0 WHERE `KW_tf_projectile_arrow` =  NULL; UPDATE `Player` SET `KW_ambassador` =0 WHERE `KW_ambassador` =  NULL; UPDATE `Player` SET `KW_taunt_sniper` =0 WHERE `KW_taunt_sniper` =  NULL; UPDATE `Player` SET `KW_taunt_spy` =0 WHERE `KW_taunt_spy` =  NULL; UPDATE `Player` SET `player_extinguished` =0 WHERE  `player_extinguished` = NULL; UPDATE `Player` SET `player_teleported` =0  WHERE `player_teleported` = NULL; UPDATE `Player` SET  `player_feigndeath` =0 WHERE `player_feigndeath` = NULL; UPDATE `Player`  SET `KW_force_a_nature` =0 WHERE `KW_force_a_nature` = NULL; UPDATE  `Player` SET `KW_sandman` =0 WHERE `KW_sandman` = NULL; UPDATE `Player`  SET `K_backstab` =0 WHERE `K_backstab` = NULL; UPDATE `Player` SET  `KW_compound_bow` =0 WHERE `KW_compound_bow` = NULL; UPDATE `Player` SET  `KW_taunt_scout` =0 WHERE `KW_taunt_scout` = NULL; UPDATE `Player` SET  `KW_deflect_arrow` =0 WHERE `KW_deflect_arrow` = NULL; UPDATE `Player`  SET `KW_rocketlauncher_directhit` =0 WHERE `KW_rocketlauncher_directhit`  = NULL; UPDATE `Player` SET `KW_telefrag` =0 WHERE `KW_telefrag` =  NULL; UPDATE `Player` SET `KW_deflect_flare` =0 WHERE `KW_deflect_flare`  = NULL; UPDATE `Player` SET `KW_taunt_soldier` =0 WHERE  `KW_taunt_soldier` = NULL; UPDATE `Player` SET `KW_pickaxe` =0 WHERE  `KW_pickaxe` = NULL; UPDATE `Player` SET `KW_demoshield` =0 WHERE  `KW_demoshield` = NULL; UPDATE `Player` SET `KW_sword` =0 WHERE  `KW_sword` = NULL; UPDATE `Player` SET `KW_taunt_demoman` =0 WHERE  `KW_taunt_demoman` = NULL; UPDATE `Player` SET `KW_sticky_resistance` =0  WHERE `KW_sticky_resistance` = NULL; UPDATE `Player` SET `KW_jar` =0  WHERE `KW_jar` = NULL;

I'll check back in a few hours to see whether it worked for you