string stkCode = ""; _baseStkInfos.ForEach(e => stkCode += e.stkCode); 优化

可以使用 `StringBuilder` 代替字符串拼接，因为字符串拼接会创建新的字符串对象，而使用 `StringBuilder` 可以避免频繁的对象创建，提高程序性能。优化后的代码如下：

StringBuilder sb = new StringBuilder();
_baseStkInfos.ForEach(e => sb.Append(e.stkCode));
string stkCode = sb.ToString();

相关问题

已知字段sec_info 的内容为[{"stkCode":"112267.SH","STK":"22a"}]字典格式， oracle如何SELECT读取STK后的值22a

你可以使用以下的SQL语句来查询字段sec_info中STK后的值22a:

SELECT JSON_VALUE(sec_info, '$.STK') AS STK_value
FROM 表名
WHERE JSON_VALUE(sec_info, '$.stkCode') = '112267.SH';

这个SQL语句使用了JSON_VALUE函数来提取sec_info字段中STK的值，并且使用了JSON_VALUE函数来判断stkCode是否等于'112267.SH'。<span class="em">1</span><span class="em">2</span>
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