我正在使用JasperSoft Studio 6.5.0，当我正在预览具有子报表的报表时，它标记了一个例外，更具体地说：
net.sf.jasperreports.engine.JRRuntimeException: net.sf.jasperreports.engine.JRException: Error executing SQL statement for: Calificaciones.
起初看起来SQL查询有错误。但是，当我单独预览子报表时，它会显示包含数据库中数据的信息，所以我无法弄清楚出了什么问题。
这是我的子报告：
<?xml version="1.0" encoding="UTF-8"?>
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="Calificaciones" pageWidth="570" pageHeight="504" columnWidth="570" leftMargin="0" rightMargin="0" topMargin="0" bottomMargin="0" uuid="68d09970-7b06-4119-9606-fbbc390716b0">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="DataAdapter.xml"/>
<parameter name="ALUMNO" class="java.lang.Integer">
<defaultValueExpression><![CDATA[12280028]]></defaultValueExpression>
</parameter>
<queryString>
<![CDATA[SELECT *
FROM "CALIFICACION"
WHERE
"CALIFICACION"."ALUMNO" = $P!{ALUMNO}]]>
</queryString>
<field name="ALUMNO" class="java.lang.Integer">
<property name="com.jaspersoft.studio.field.label" value="ALUMNO"/>
</field>
<field name="MATERIA" class="java.lang.String">
<property name="com.jaspersoft.studio.field.label" value="MATERIA"/>
</field>
<field name="SEMESTRE" class="java.lang.Integer">
<property name="com.jaspersoft.studio.field.label" value="SEMESTRE"/>
</field>
<field name="CALIFICACION" class="java.lang.Integer">
<property name="com.jaspersoft.studio.field.label" value="CALIFICACION"/>
</field>
<columnHeader>
<band height="56" splitType="Stretch">
<frame>
<reportElement x="0" y="0" width="570" height="50" uuid="5a55697b-3939-4e25-9b66-046bb30990ca"/>
<staticText>
<reportElement x="10" y="10" width="100" height="30" uuid="1ec69f21-5468-4226-8d53-05c44c4e2b94"/>
<textElement>
<font size="18"/>
</textElement>
<text><![CDATA[Materia]]></text>
</staticText>
<staticText>
<reportElement x="450" y="10" width="100" height="30" uuid="693359ba-2558-478b-abad-574223e78887"/>
<textElement>
<font size="18"/>
</textElement>
<text><![CDATA[Semestre]]></text>
</staticText>
<staticText>
<reportElement x="260" y="10" width="100" height="30" uuid="65817781-bc80-4c85-9893-3fee93e34bd6"/>
<textElement>
<font size="18"/>
</textElement>
<text><![CDATA[Calificación]]></text>
</staticText>
</frame>
</band>
</columnHeader>
<detail>
<band height="62" splitType="Stretch">
<frame>
<reportElement x="0" y="0" width="570" height="60" uuid="aaaa0932-c998-4f7c-ab73-4c7b20c61564"/>
<textField>
<reportElement x="10" y="10" width="230" height="40" uuid="f1226292-0222-4248-aaef-20a406b7d07c"/>
<textElement>
<font size="14"/>
</textElement>
<textFieldExpression><![CDATA[$F{MATERIA}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="260" y="10" width="140" height="40" uuid="c40dd075-90b7-46aa-9a23-d3db059dbe85"/>
<textElement>
<font size="14"/>
</textElement>
<textFieldExpression><![CDATA[$F{CALIFICACION}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="450" y="10" width="100" height="40" uuid="e5a25ff6-eddc-4e99-853d-456ef7e103cb"/>
<textElement>
<font size="14"/>
</textElement>
<textFieldExpression><![CDATA[$F{SEMESTRE}]]></textFieldExpression>
</textField>
</frame>
</band>
</detail>
</jasperReport>
这是我的报告
<?xml version="1.0" encoding="UTF-8"?>
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="Subreporte" pageWidth="570" pageHeight="595" columnWidth="570" leftMargin="0" rightMargin="0" topMargin="0" bottomMargin="0" uuid="9372f370-43af-4eba-bc60-91d7b03943d1">
<property name="com.jaspersoft.studio.data.sql.tables" value=""/>
<parameter name="ALUMNO" class="java.lang.Integer">
<defaultValueExpression><![CDATA[12280028]]></defaultValueExpression>
</parameter>
<queryString>
<![CDATA[SELECT *
FROM "ALUMNO"
WHERE ID = $P!{ALUMNO}]]>
</queryString>
<field name="ID" class="java.lang.Integer">
<property name="com.jaspersoft.studio.field.label" value="ID"/>
</field>
<field name="NOMBRE" class="java.lang.String">
<property name="com.jaspersoft.studio.field.label" value="NOMBRE"/>
</field>
<field name="APELLIDO" class="java.lang.String">
<property name="com.jaspersoft.studio.field.label" value="APELLIDO"/>
</field>
<field name="CARRERA" class="java.lang.String">
<property name="com.jaspersoft.studio.field.label" value="CARRERA"/>
</field>
<title>
<band height="40" splitType="Stretch">
<staticText>
<reportElement x="0" y="0" width="150" height="30" uuid="5e78931c-e260-401a-8466-1eab75a44911"/>
<textElement>
<font size="18"/>
</textElement>
<text><![CDATA[Datos del alumno]]></text>
</staticText>
</band>
</title>
<columnHeader>
<band height="45" splitType="Stretch">
<frame>
<reportElement x="0" y="0" width="570" height="40" uuid="f2dc139e-4ea6-4469-817f-504f1370ec71"/>
<staticText>
<reportElement mode="Transparent" x="0" y="7" width="120" height="30" uuid="f47b00e0-0c00-4aff-9c6f-e048d4c83581"/>
<textElement>
<font size="14"/>
</textElement>
<text><![CDATA[Número de control]]></text>
</staticText>
<staticText>
<reportElement x="180" y="7" width="120" height="25" uuid="b7659814-96fb-4c44-8545-c11664a480d6"/>
<textElement>
<font size="14"/>
</textElement>
<text><![CDATA[Nombre completo]]></text>
</staticText>
<staticText>
<reportElement x="380" y="7" width="100" height="25" uuid="98907558-8463-49f9-af43-659da31bca37"/>
<textElement>
<font size="14"/>
</textElement>
<text><![CDATA[Carrera]]></text>
</staticText>
</frame>
</band>
</columnHeader>
<detail>
<band height="214" splitType="Stretch">
<frame>
<reportElement mode="Opaque" x="0" y="0" width="570" height="103" forecolor="#E1E1E1" backcolor="#E1E1E1" uuid="faf75383-c92f-47bb-987c-a74a58e4d33f"/>
<textField isBlankWhenNull="true">
<reportElement x="0" y="10" width="120" height="30" uuid="9dd8e336-1215-4dd9-b9e4-91382a97321d"/>
<textElement>
<font size="16"/>
</textElement>
<textFieldExpression><![CDATA[$F{ID}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="180" y="10" width="180" height="30" uuid="e270ce97-b83c-4883-a78c-9c1764d09789"/>
<textElement>
<font size="14"/>
</textElement>
<textFieldExpression><![CDATA[$F{NOMBRE}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="180" y="50" width="180" height="30" uuid="dd3d076b-5ced-4c42-a2f2-896058c1f7b2"/>
<textElement>
<font size="14"/>
</textElement>
<textFieldExpression><![CDATA[$F{APELLIDO}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="380" y="10" width="181" height="70" uuid="6f8a6679-c2aa-4e9b-92cc-e165099918a0"/>
<textElement>
<font size="14"/>
</textElement>
<textFieldExpression><![CDATA[$F{CARRERA}]]></textFieldExpression>
</textField>
<line>
<reportElement positionType="Float" x="0" y="90" width="570" height="1" uuid="4230ed88-1865-41e3-a387-2d007c11a39e"/>
</line>
</frame>
<subreport>
<reportElement x="0" y="103" width="570" height="107" uuid="6796d833-6825-428a-844f-64b7247dcbe8"/>
<subreportParameter name="ALUMNO">
<subreportParameterExpression><![CDATA[$F{ID}]]></subreportParameterExpression>
</subreportParameter>
<connectionExpression><![CDATA[$P{REPORT_CONNECTION}]]></connectionExpression>
<subreportExpression><![CDATA["Calificaciones.jasper"]]></subreportExpression>
</subreport>
</band>
</detail>
</jasperReport>
控制台中的完整堆栈跟踪显示以下内容：
net.sf.jasperreports.engine.JRException: net.sf.jasperreports.engine.JRRuntimeException: net.sf.jasperreports.engine.JRException: Error executing SQL statement for: Calificaciones.
at com.jaspersoft.studio.editor.preview.view.control.ReportController.fillReport(ReportController.java:550)
at com.jaspersoft.studio.editor.preview.view.control.ReportController.access$16(ReportController.java:525)
at com.jaspersoft.studio.editor.preview.view.control.ReportController$1.run(ReportController.java:420)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
Caused by: net.sf.jasperreports.engine.JRRuntimeException: net.sf.jasperreports.engine.JRException: Error executing SQL statement for: Calificaciones.
at net.sf.jasperreports.engine.fill.JRFillSubreport.prepare(JRFillSubreport.java:878)
at net.sf.jasperreports.engine.fill.JRFillElementContainer.prepareElements(JRFillElementContainer.java:542)
at net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:438)
at net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:413)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2536)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:791)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:252)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:99)
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:609)
at net.sf.jasperreports.engine.fill.BaseFillHandle$ReportFill.run(BaseFillHandle.java:123)
at java.lang.Thread.run(Thread.java:748)
Caused by: net.sf.jasperreports.engine.JRException: Error executing SQL statement for: Calificaciones.
at net.sf.jasperreports.engine.query.JRJdbcQueryExecuter.createDatasource(JRJdbcQueryExecuter.java:347)
at net.sf.jasperreports.engine.fill.JRFillDataset.createQueryDatasource(JRFillDataset.java:1245)
at net.sf.jasperreports.engine.fill.JRFillDataset.initDatasource(JRFillDataset.java:723)
at net.sf.jasperreports.engine.fill.BaseReportFiller.setParameters(BaseReportFiller.java:429)
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:572)
at net.sf.jasperreports.engine.fill.BaseReportFiller.fill(BaseReportFiller.java:387)
at net.sf.jasperreports.engine.fill.JRFillSubreport.fillSubreport(JRFillSubreport.java:736)
at net.sf.jasperreports.engine.fill.JRSubreportRunnable.run(JRSubreportRunnable.java:59)
at net.sf.jasperreports.engine.fill.AbstractThreadSubreportRunner.run(AbstractThreadSubreportRunner.java:221)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
... 1 more
Caused by: java.sql.SQLSyntaxErrorException: ORA-00979: no es una expresión GROUP BY
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:447)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:396)
at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:951)
at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:513)
at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:227)
at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:531)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:208)
at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:886)
at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1175)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1296)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3613)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3657)
at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1495)
at net.sf.jasperreports.engine.query.JRJdbcQueryExecuter.createDatasource(JRJdbcQueryExecuter.java:310)
... 11 more