{
  "introduction": "nhUKKWyBH80nyKfGT8ErC",
  "introduction:what-are-relational-databases": "R9DQNc0AyAQ2HLpP4HOk6",
  "introduction:rdbms-benefits-limitations": "fNTb9y3zs1HPYclAmu_Wv",
  "introduction:sql-vs-nosql": "gx4KaFqKgJX9n9_ZGMqlZ",
  "basic-syntax": "JDDG4KfhtIlw1rkNCzUli",
  "basic-syntax:keywords": "6yoo7qC6X2jYDIjd3HIm7",
  "basic-syntax:data-types": "tBzMDfCMh6MIagNaxCzin",
  "basic-syntax:operators": "ffwniprGJHZzJ7t3lQcXz",
  "basic-syntax:statements:select": "rmqXH29n1oXtZ8tvmcRFn",
  "basic-syntax:statements:insert": "mPj6BiK5FKKkIQ9WsWEo6",
  "basic-syntax:statements:update": "eu9dJFi6gBPMBdy08Y5Bb",
  "basic-syntax:statements:delete": "ddtVaA4Ls6qRj-7OtTSIH",
  "ddl": "xPOeXK1EPBNG56vgfG-VV",
  "ddl:drop-table": "YzJ6QmY2arMfRzMAPaI0T",
  "ddl:create-table": "epEpBxRosLhuAuKwp823r",
  "ddl:alter-table": "WjXlO42WL9saDS7RIGapt",
  "ddl:truncate-table": "K5vhqTJrdPK08Txv8zaEj",
  "dml": "WMSXi-eez_hHGDM8kUdWz",
  "dml:select": "i8u8E_sne6XiKJo2FXDog",
  "dml:from": "N1Racr3ZpU320gS545We8",
  "dml:where": "WhYAy6f7Euk3E49-ot644",
  "dml:order-by": "NfCiSPrL4upMssukcw3Kh",
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  "dml:having": "ytwCkSMTiTuemE0KVfAfy",
  "dml:joins": "4UQQYbjzwVxZOAxBuXKQS",
  "dml:insert": "-Hew0y53ziZK3epQnGA0O",
  "dml:update": "KJJ6PYjTnr_3yU2mNPL9v",
  "dml:delete": "zWnvuHJLHr03PWkrW1wZZ",
  "aggregate-queries": "LX9nzJ4uqznHN4SksoDvr",
  "aggregate-queries:sum": "w4T3jFb0ilf1KNw-AvRXG",
  "aggregate-queries:count": "9aHYrOQDkA84tlxcVK5aD",
  "aggregate-queries:avg": "Wou6YXLYUgomvcELh851L",
  "aggregate-queries:min": "bFEYMlqPZtTUYtDQxqHzT",
  "aggregate-queries:max": "YqDJq3fPxUZlwsdq0kJg7",
  "aggregate-queries:group-by": "Zw8IHfCCMSxmVjx5Ho5ff",
  "aggregate-queries:having": "HhICJpCK5__b-itUoEBES",
  "data-constraints": "qBios3sZVhcJMpXmj9f7B",
  "data-constraints:primary-key": "Jlwmyq6CUQeDAlL4dazOP",
  "data-constraints:foreign-key": "DHz6sRLYhFeCbAcNJS8hm",
  "data-constraints:unique": "5yGo8i7eplxtXOD_qfzOs",
  "data-constraints:not-null": "M4M_-vjM9GNy0NmXZneDA",
  "data-constraints:check": "Q0h9Wfnl_W9ThOkv7Q17A",
  "join-queries": "8V6yw7kLaow-VVcv_K_pL",
  "join-queries:inner-join": "aaua13CkTxLOYXr8cAgPm",
  "join-queries:left-join": "X9cJJ8zLZCF2cOoqxwFfY",
  "join-queries:right-join": "shpgZkh1CLqUwjOaRtAFy",
  "join-queries:full-outer-join": "aS5zCyJRA779yHF0G2pje",
  "join-queries:self-join": "6qG0AVYd6Y1B8LOSDoMX9",
  "join-queries:cross-join": "7ow6tiSSCnTpv_GYQU017",
  "sub-queries": "86iZ8s8EdhSuYwgwAM_EO",
  "sub-queries:types:scalar": "eXQ-TrTlqL5p2AdGnozkL",
  "sub-queries:types:column": "wmtt-3auWLdQWuVdwZLPd",
  "sub-queries:types:row": "aLDl75i8gtLRA2Ud-fMmQ",
  "sub-queries:types:table": "R9WDMRd-3wxsKH97-sT3n",
  "sub-queries:nested-subqueries": "xkPJ2MYiXmzC4yqQWyB_7",
  "sub-queries:correlated-subqueries": "JZqS3Xapw6mfSPVgFW7av",
  "advanced-sql-functions": "vTMd0bqz4eTgLnhfgY61h",
  "advanced-sql-functions:floor": "o2SH4iQn1Ap2yDZ7cVYLO",
  "advanced-sql-functions:abs": "6vYFb_D1N_-tLWZftL-Az",
  "advanced-sql-functions:mod": "OUw--8zEq6lk5-6oySVHe",
  "advanced-sql-functions:round": "9DntFiZV1AyaRPhYP5q6u",
  "advanced-sql-functions:ceiling": "BAqJQvcguhIhzyII5LRH6",
  "advanced-sql-functions:conditional:case": "W2ePJHdfEiEJ3ZKoRQKt_",
  "advanced-sql-functions:conditional:nullif": "KI6vngoYcHsnpIk8ErhhS",
  "advanced-sql-functions:conditional:coalesce": "k7lZe4QRt9q4InUImFmvx",
  "advanced-sql-functions:string:concat": "5inpEqafeVCfqsURHzQQg",
  "advanced-sql-functions:string:length": "RH8DLiQpDUWqw3U1522q5",
  "advanced-sql-functions:string:substring": "PnG_5D6q66NAKxXVOwA6N",
  "advanced-sql-functions:string:replace": "VNbb3YPc0FtrROylRns8h",
  "advanced-sql-functions:string:upper": "Othfo7NvTVzfyL906PLM1",
  "advanced-sql-functions:string:lower": "knTG6pAq2mYP24WMa29xI",
  "advanced-sql-functions:date-time:date": "Ivqo2wa-_NhGU3vGd0pUI",
  "advanced-sql-functions:date-time:time": "88KlrMqSza9_YaD7Dv61p",
  "advanced-sql-functions:date-time:datepart": "BJ4fQvagTO0B5UtXblyx8",
  "advanced-sql-functions:date-time:dateadd": "1E1WdWOyqxbbdiIbw26dZ",
  "advanced-sql-functions:date-time:timestamp": "7hEqkoxkdAWmakGZsMJx-",
  "views": "2tyezwOIxV6O84N-Q3Awh",
  "views:creating": "PcsGK4VBh0zNQIPZvNES4",
  "views:modifying": "3eE-l-P93nOXoWfLr8PSW",
  "views:dropping": "MIOuWWcCjLAmgzog2DBC3",
  "indexes": "LcljR70T-OnzSrJJDqOWf",
  "indexes:managing-indexes": "NtxGd6Vx-REBclry7lZuE",
  "indexes:query-optimization": "Ps9Yv2s-bKvEegGAbPsiA",
  "transactions": "OdaBXz2XBAVLsQ-m7xtAM",
  "transactions:acid": "igg34gLPl3HYVAmRNFGcV",
  "transactions:begin": "7sTW1vwUhCFOMXYjScVEt",
  "transactions:commit": "3cMECz5QPVDOFrk5duObs",
  "transactions:rollback": "xbD67KVlt3UhHpKh8HLx8",
  "transactions:savepoint": "pJtYvXUo81aZfPuRjIbMq",
  "transactions:isolation-levels": "ujeq8EIFcrqkBjoFizsJM",
  "integrity-security": "R1ktDJpXOz0PTllAcBrdu",
  "integrity-security:constraints": "mBQ3Z8GlFcpIena3IB7D_",
  "integrity-security:grant-revoke": "03qMopxzjx_-dZbYw9b7J",
  "integrity-security:security-best-practices": "vhBZqqmUcEon6-Vwvla4q",
  "stored-procedures-functions": "w7FNjdwqjY7X69aJqqBy4",
  "perf-optimization": "4rqCPpTb0dAgpheBKshRG",
  "perf-optimization:query-optimization:indexes": "9wOgP0i9G4HSeZGn2Gm7r",
  "perf-optimization:query-optimization:optimizing-joins": "C0dhS6uLf4TUSfvcWyXhv",
  "perf-optimization:query-optimization:reducing-subqueries": "UVTgbZrqpbYl1bQvQejcF",
  "perf-optimization:query-optimization:selective-projection": "w53CSY53nAAN0ux-XeJ4c",
  "perf-optimization:query-analysis": "C6P69YiFdS-ioPXMNfX07",
  "advanced-sql": "UDqbT1y-YzBrljfKSz_RG",
  "advanced-sql:recursive-queries": "TjgwabhEtaSoYMLNr6q9l",
  "advanced-sql:pivot-unpivot": "nwFaz9i-1s0WVrVaFsoqb",
  "advanced-sql:window-functions": "tBvXLLp5FKeSSN35Kj1X4",
  "advanced-sql:ctes": "tedQynR0xicVKhuR1oahw",
  "advanced-sql:dynamic-sql": "z5Sf0VU14ZCQ80kL1qOqc",
  "advanced-sql:window-functions:rank": "cucCPw3KfetAP2OMFUs0X",
  "advanced-sql:window-functions:dense-rank": "QM0ltgPu8lLLYc2MsTLj-",
  "advanced-sql:window-functions:lead": "aJJjaGunRrwyh9MjQfJt-",
  "advanced-sql:window-functions:lag": "BcXdxY6bld5c0YNFSKkh-",
  "advanced-sql:window-functions:row-number": "zW27ZHdLwQY-85iqbBKQZ"
}