使用标准ant sql任务无法执行此操作。

使用常规脚本来设置属性，如下所示：

<target name="query">
    <taskdef name="groovy" classname="org.codehaus.groovy.ant.Groovy" classpathref="build.path"/>

    <groovy>
    import groovy.sql.Sql

    def sql = Sql.newInstance(properties."db.url", properties."db.user", properties."db.pass", properties."db.driver")
    def row = sql.firstRow("SELECT count(*) from example1")

    properties."row.count" = row[0]
    </groovy>
</target>

<target name="result" depends="query">
    <echo message="Row count: ${row.count}"/>
</target>