小编use*_*409的帖子

什么是MySQL查询来计算包含相同值的总行数.例如:

考虑一个animal包含所有动物名称的表格.如果表中有5行包含值name,'cow'那么对它的查询是什么？

这是我的代码,我想计算这里的对象数量.

使用eval函数我能够获得元素,但不知道如何计算其中的总对象.有人可以帮帮我吗？

var txt = '{
    "employees": [{
        "a": "wkn",
        "d": "Wipro Technologies \u2013 IT Services, Product Engineering Solutions, Technology Infrastructure Services, Business Process Outsourcing, Consulting Services",
        "n": "",
        "u": "http://wipro.com/",
        "t": ["outsourcing", "offshore", "india"],
        "dt": "2009-06-26T10:26:02Z"
    }, {
        "a": "shaktimaan",
        "d": "Wipro Technologies \u2013 IT Services, Product Engineering Solutions, Technology Infrastructure Services, Business Process Outsourcing, Consulting Services",
        "n": "Wipro Technologies is the No 1 provider of integrated business, technology and process solutions on a global delivery platform.",
        "u": "http://wipro.com/", …