This field stores multiple product information using the letter "," where "_" is preceded by the product code," _" followed by the purchase time, and how to retrieve the customer information that matches the results based on the product code and purchase time.
It may be that I have not described enough. es store a product field. The value of this field is composed of "product code + product time". There will be multiple data. Use "," to distinguish. I fill in the on the page Product Code and Product Time, how should I search for data that meets both criteria
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