You are now a sqlite data analyst, and you are given a database schema as follows:

    【Schema】
    【DB_ID】 card_games
【Schema】
# Table: set_translations
[
(id:INTEGER, Primary Key, Examples: [1, 2, 3]),
(language:TEXT, Examples: [Chinese Simplified, Chinese Traditional, French]),
(setCode:TEXT, Examples: [10E, 4ED, 5DN]),
(translation:TEXT, Examples: [核心系列第十版])
]
# Table: legalities
[
(id:INTEGER, Primary Key, Examples: [1, 2, 3]),
(format:TEXT, Examples: [commander, duel, legacy]),
(status:TEXT, Examples: [Legal, Banned, Restricted]),
(uuid:TEXT, Examples: [5f8287b1-5bb6-5f4c-ad17-316a40d5bb0c])
]
# Table: cards
[
(id:INTEGER, Primary Key, Examples: [41138, 1349, 23810]),
(artist:TEXT, Examples: [Pete Venters, Volkan Baǵa, Justin Sweet]),
(asciiName:TEXT, Examples: [El-Hajjaj, Junun Efreet, Dandan]),
(availability:TEXT, Examples: [mtgo,paper, paper, arena]),
(borderColor:TEXT, Examples: [black, white, borderless]),
(cardKingdomFoilId:TEXT, Examples: [123094, 123095, 123096]),
(cardKingdomId:TEXT, Examples: [122719, 122720, 122725]),
(colorIdentity:TEXT, Examples: [W, B, U]),
(colorIndicator:TEXT, Examples: [U, G, R]),
(colors:TEXT, Examples: [W, B, U]),
(convertedManaCost:REAL, Examples: [7.0, 5.0, 4.0]),
(duelDeck:TEXT, Examples: [a, b]),
(edhrecRank:INTEGER, Examples: [15650, 12702, 11081]),
(faceConvertedManaCost:REAL, Examples: [4.0, 5.0, 6.0]),
(faceName:TEXT, Examples: [Dusk, Dawn, Commit]),
(flavorName:TEXT, Examples: [Godzilla, King of the Monsters]),
(flavorText:TEXT),
(frameEffects:TEXT, Examples: [legendary, nyxtouched, miracle]),
(frameVersion:TEXT, Examples: [2003, 1993, 2015]),
(hand:TEXT, Examples: [1, 0, -2]),
(hasAlternativeDeckLimit:INTEGER, Examples: [0, 1]),
(hasContentWarning:INTEGER, Examples: [0, 1]),
(hasFoil:INTEGER, Examples: [0, 1]),
(hasNonFoil:INTEGER, Examples: [1, 0]),
(isAlternative:INTEGER, Examples: [0, 1]),
(isFullArt:INTEGER, Examples: [0, 1]),
(isOnlineOnly:INTEGER, Examples: [0, 1]),
(isOversized:INTEGER, Examples: [0, 1]),
(isPromo:INTEGER, Examples: [0, 1]),
(isReprint:INTEGER, Examples: [1, 0]),
(isReserved:INTEGER, Examples: [0, 1]),
(isStarter:INTEGER, Examples: [0, 1]),
(isStorySpotlight:INTEGER, Examples: [0, 1]),
(isTextless:INTEGER, Examples: [0, 1]),
(isTimeshifted:INTEGER, Examples: [0, 1]),
(keywords:TEXT, Examples: [First strike, Flying, First strike,Flash]),
(layout:TEXT, Examples: [normal, aftermath, split]),
(leadershipSkills:TEXT),
(life:TEXT, Examples: [-5, -1, 2]),
(loyalty:TEXT, Examples: [6, 3, 4]),
(manaCost:TEXT, Examples: [{5}{W}{W}, {4}{W}, {3}{W}]),
(mcmId:TEXT, Examples: [16165, 16166, 16171]),
(mcmMetaId:TEXT, Examples: [156, 176, 368]),
(mtgArenaId:TEXT, Examples: [74983, 74986, 74987]),
(mtgjsonV4Id:TEXT, Examples: [ad41be73-582f-58ed-abd4-a88c1f616ac3]),
(mtgoFoilId:TEXT, Examples: [27501, 26993, 27473]),
(mtgoId:TEXT, Examples: [27500, 26992, 27472]),
(multiverseId:TEXT, Examples: [130550, 129465, 129470]),
(name:TEXT, Examples: [Ancestor's Chosen, Angel of Mercy, Aven Cloudchaser]),
(number:TEXT, Examples: [1, 2, 7]),
(originalReleaseDate:TEXT, Examples: [2012/12/1, 2006/12/1, 2007/12/1]),
(originalText:TEXT),
(originalType:TEXT, Examples: [Creature - Human Cleric]),
(otherFaceIds:TEXT, Examples: [87f0062a-8321-5c16-960e-a12ce1df5839]),
(power:TEXT, Examples: [4, 3, 2]),
(printings:TEXT),
(promoTypes:TEXT, Examples: [boxtopper,boosterfun, boosterfun, release,buyabox]),
(purchaseUrls:TEXT),
(rarity:TEXT, Examples: [uncommon, common, rare]),
(scryfallId:TEXT, Examples: [7a5cd03c-4227-4551-aa4b-7d119f0468b5]),
(scryfallIllustrationId:TEXT, Examples: [be2f7173-c8b7-4172-a388-9b2c6b3c16e5]),
(scryfallOracleId:TEXT, Examples: [fc2ccab7-cab1-4463-b73d-898070136d74]),
(setCode:TEXT, Examples: [10E, 2ED, 2XM]),
(side:TEXT, Examples: [a, b, c]),
(subtypes:TEXT, Examples: [Human,Cleric, Angel, Bird,Soldier]),
(supertypes:TEXT, Examples: [Legendary, Basic, Legendary,Snow]),
(tcgplayerProductId:TEXT, Examples: [15032, 15033, 15045]),
(text:TEXT),
(toughness:TEXT, Examples: [4, 3, 2]),
(type:TEXT, Examples: [Creature — Human Cleric]),
(types:TEXT, Examples: [Creature, Instant, Enchantment]),
(uuid:TEXT, Examples: [00010d56-fe38-5e35-8aed-518019aa36a5]),
(variations:TEXT, Examples: [b7c19924-b4bf-56fc-aa73-f586e940bd42]),
(watermark:TEXT, Examples: [set (HOU), set (LGN), set (ONS)])
]
# Table: sets
[
(id:INTEGER, Primary Key, Examples: [1, 2, 3]),
(baseSetSize:INTEGER, Examples: [383, 302, 332]),
(block:TEXT, Examples: [Core Set, Mirrodin, Kaladesh]),
(booster:TEXT),
(code:TEXT, Examples: [10E, 2ED, 2XM]),
(isFoilOnly:INTEGER, Examples: [0, 1]),
(isForeignOnly:INTEGER, Examples: [0, 1]),
(isNonFoilOnly:INTEGER, Examples: [0, 1]),
(isOnlineOnly:INTEGER, Examples: [0, 1]),
(isPartialPreview:INTEGER, Examples: [0, 1]),
(keyruneCode:TEXT, Examples: [10E, 2ED, 2XM]),
(mcmId:INTEGER, Examples: [74, 3204, 10]),
(mcmIdExtras:INTEGER, Examples: [3209, 3459, 2587]),
(mcmName:TEXT, Examples: [Tenth Edition, Double Masters, Fourth Edition]),
(mtgoCode:TEXT, Examples: [10E, 2XM, 5DN]),
(name:TEXT, Examples: [Tenth Edition, Unlimited Edition, Double Masters]),
(parentCode:TEXT, Examples: [JMP, MH1, ZNR]),
(releaseDate:DATE, Examples: [2007-07-13]),
(tcgplayerGroupId:INTEGER, Examples: [1, 115, 2655]),
(totalSetSize:INTEGER, Examples: [508, 302, 384]),
(type:TEXT, Examples: [core, masters, expansion])
]
# Table: rulings
[
(id:INTEGER, Primary Key, Examples: [1, 2, 3]),
(date:DATE, Examples: [2007-07-15]),
(text:TEXT),
(uuid:TEXT, Examples: [6d268c95-c176-5766-9a46-c14f739aba1c])
]
# Table: foreign_data
[
(id:INTEGER, Primary Key, Examples: [1, 2, 3]),
(flavorText:TEXT),
(language:TEXT, Examples: [German, Spanish, French]),
(multiverseid:INTEGER, Examples: [148411, 150317, 149934]),
(name:TEXT, Examples: [Ausgewählter der Ahnfrau]),
(text:TEXT),
(type:TEXT, Examples: [Kreatur — Mensch, Kleriker]),
(uuid:TEXT, Examples: [5f8287b1-5bb6-5f4c-ad17-316a40d5bb0c])
]
【Foreign keys】
set_translations.setCode=sets.code
legalities.uuid=cards.uuid
rulings.uuid=cards.uuid
foreign_data.uuid=cards.uuid

    【Question】
    Did the set of cards with "Angel of Mercy" appear on Magic: The Gathering Online? card set "Angel of Mercy" refers to name = 'Angel of Mercy'; appear on Magic: The Gathering Online refers to mtgoCode is NOT NULL and vice versa

    【Evidence】
    card set "Angel of Mercy" refers to name = 'Angel of Mercy'; appear on Magic: The Gathering Online refers to mtgoCode is NOT NULL and vice versa

    Please read and understand the database schema carefully, and generate an executable SQL based on the user's question and evidence. 

SQL: SELECT IIF(T2.mtgoCode IS NOT NULL, 'YES', 'NO') FROM cards AS T1 INNER JOIN sets AS T2 ON T2.code = T1.setCode WHERE T1.name = 'Angel of Mercy'