Description: SQL aggregate function using the SQL aggregate functions you can be sure of the various statistical data sets. You can put these functions together for query and expression, on the condition that the availability of SQL characteristics QueryDef object or create a SQL query based on the Recordset object. Avg Function Count Function First, Last function Min, Max function StDev, StDevP function Sum function Var and VARP function
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数据库技术：《SQL 参考手册》中文版.chm
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