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punctuation"}},[t._v(".")]),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("executeQuery")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("sql"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("System")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("out"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("println")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),n("span",{pre:!0,attrs:{class:"token string"}},[t._v('"sql: "')]),t._v(" "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("+")]),t._v(" sql"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token 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punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("System")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("out"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("println")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),n("span",{pre:!0,attrs:{class:"token string"}},[t._v('"sql: "')]),t._v(" "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("+")]),t._v(" sql"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("outputResult")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("resultSet"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n    "),n("span",{pre:!0,attrs:{class:"token comment"}},[t._v("//Time range query")]),t._v("\n    sql "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token string"}},[t._v('"select s0 from root.demo where time >= 2 and time < 5;"')]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    resultSet "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" statement"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("executeQuery")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("sql"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("System")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("out"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("println")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),n("span",{pre:!0,attrs:{class:"token string"}},[t._v('"sql: "')]),t._v(" "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("+")]),t._v(" sql"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("outputResult")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("resultSet"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n    "),n("span",{pre:!0,attrs:{class:"token comment"}},[t._v("//Aggregate query")]),t._v("\n    sql "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token string"}},[t._v('"select count(s0) from root.demo;"')]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    resultSet "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" statement"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("executeQuery")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("sql"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("System")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("out"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("println")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),n("span",{pre:!0,attrs:{class:"token string"}},[t._v('"sql: "')]),t._v(" "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("+")]),t._v(" sql"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("outputResult")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("resultSet"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n    "),n("span",{pre:!0,attrs:{class:"token comment"}},[t._v("//Delete time series")]),t._v("\n    statement"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("execute")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),n("span",{pre:!0,attrs:{class:"token string"}},[t._v('"delete timeseries root.demo.s0"')]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n    "),n("span",{pre:!0,attrs:{class:"token comment"}},[t._v("//close connection")]),t._v("\n    statement"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("close")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    connection"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("close")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n  "),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n\n  "),n("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("public")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("static")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("Connection")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("getConnection")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// JDBC driver name and database URL")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("String")]),t._v(" driver "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token string"}},[t._v('"org.apache.iotdb.jdbc.IoTDBDriver"')]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("String")]),t._v(" url "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token string"}},[t._v('"jdbc:iotdb://127.0.0.1:6667/"')]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n    "),n("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// Database credentials")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("String")]),t._v(" username "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token string"}},[t._v('"root"')]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("String")]),t._v(" password "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token string"}},[t._v('"root"')]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n    "),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("Connection")]),t._v(" connection "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("null")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("try")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n      "),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("Class")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("forName")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("driver"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n      connection "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("DriverManager")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("getConnection")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("url"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" username"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" password"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("catch")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("ClassNotFoundException")]),t._v(" e"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n      e"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("printStackTrace")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("catch")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("SQLException")]),t._v(" e"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n      e"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("printStackTrace")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("return")]),t._v(" connection"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n  "),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n\n  "),n("span",{pre:!0,attrs:{class:"token comment"}},[t._v("/**\n   * This is an example of outputting the results in the ResultSet\n   */")]),t._v("\n  "),n("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("private")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("static")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("void")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("outputResult")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("ResultSet")]),t._v(" resultSet"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("throws")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("SQLException")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n    "),n("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("if")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("resultSet "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("!=")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("null")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n      "),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("System")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("out"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("println")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),n("span",{pre:!0,attrs:{class:"token string"}},[t._v('"--------------------------"')]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n      "),n("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("final")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("ResultSetMetaData")]),t._v(" metaData "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" resultSet"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("getMetaData")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n      "),n("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("final")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("int")]),t._v(" columnCount "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" metaData"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),n("span",{pre:!0,attrs:{class:"token function"}},[t._v("getColumnCount")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n      "),n("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("for")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),n("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("int")]),t._v(" i "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token number"}},[t._v("0")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v(" i "),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),t._v(" columnCount"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v(" i"),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("++")]),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n        "),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("System")]),n("span",{pre:!0,attrs:{class:"token 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