无详细内容 无 这里提取指定符串"A"在字段中的出现次数SQL为: select len(keyword)-len(replace(keyword, 'A', ' ')) from 表
这里提取指定符串"A"在字段中的出现次数SQL为:
select len(keyword)-len(replace(keyword, 'A', ' ')) from 表
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