我可以在UNNEST collection derived table下找到<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Add Article</title>
</head>
<body>
<center>
<h2>Create New Article</h2>
<form:form action="/one2one/articles/save.do" method="POST" modelAttribute="command">
<table>
<tr>
<td><form:label path="id">Article ID</form:label></td>
<td><form:input path="id" value="${article.id}"></form:input></td>
</tr>
<tr>
<td><form:label path="title">Article Title</form:label></td>
<td><form:input path="title" value="${article.title}"></form:input></td>
</tr>
<tr>
<td><form:label path="description">Article Description:</form:label></td>
<td><form:input path="description" value="${article.description}" cssStyle="width: 150px;"></form:input></td>
</tr>
<tr>
<td><form:label path="category.categoryId">Category Type</form:label></td>
<td><form:select path="category.categoryId" cssStyle="width: 150px;">
<option value="-1">Select a type</option>
<c:forEach items="${categories}" var="category">
<option <c:if test="${category.categoryName eq article.category.categoryName}">selected="selected"</c:if>
value="${category.categoryId}">${category.categoryName}</option>
</c:forEach>
</form:select>
</td>
</tr>
<tr>
<td><form:label path="keywords">Article Keywords:</form:label></td>
<td><form:input path="keywords" value="${article.keywords}"></form:input></td>
</tr>
<tr>
<td><form:label path="content">Article Content:</form:label></td>
<td><form:input path="content" value="${article.content}"></form:input></td>
</tr>
<tr>
<td> </td>
<td><input type="submit" value="SAVE"/></td>
</tr>
</table>
</form:form>
</center>
</body>
</html>
（我有实际规范的副本），但它从未定义过这种构造的语义...... < / p>
从进一步的研究中，我变得更加困惑。它看起来像在SQL-99中（仅从语法...）看起来你不能在SELECT列表中使用它，这让我想知道你应该如何实际使用它？我想LATERAL是必需的吗？