目录1. 索引优化业务场景1. 创建表 Orders2. 创建索引2.1. 创建聚集索引（Clustered Index）2.2. 创建非聚集索引（Non-clustered Index）2.3. 创建单列非聚集索引3. 删除冗余索引4. 查询优化4.1. 按 Custo
I\'m wondering if it is possible to use assigned variables as identifier in a json array. When I tried this, I was getting some unexpected results:
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