DB

1.findOne() null을 return?

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2.Database와 SQL

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3.트랜잭션

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4.MySql 설치

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5.MySQL 설치(homebrew)

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6.SQL(DDL)

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7.SQL(DML)

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8.SQL(DCL)

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9.SQL(TCL)

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10.ER_NOT_SUPPORTED_AUTH_MODE 에러

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11.MVC

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12.cmarket-database

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13.ORM

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14.Sequelize(Node.js ORM)

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