使用SQL查询从mongodb中获取以前的日期记录的查询

Question

我想通过在Spring Boot应用程序代码中使用SQL查询仅从mongodb中获取以前的日期数据

在mongo数据库中，日期存储在ISOFormat中。我只需要按日期=前一天的日期来过滤记录即可。

仅获取前一天的数据后，我仅将该数据存储在新数据集中。

代码中使用的简单查询是：

  SELECT b._id as _id,a.msisdn as msisdn,
  a.classification as classification, a.event_date_actual as 
  event_date_actual,(IFNULL(a.up_vol_mb,0) + IFNULL(b.up_vol_mb,0)) as 
  up_vol_mb,(IFNULL(a.down_vol_mb,0) + IFNULL(b.down_vol_mb,0)) as 
  down_vol_mb,(IFNULL(a.total_vol_mb,0) + IFNULL(b.total_vol_mb,0)) as 
  total_vol_mb FROM SlaveSchemaTable a LEFT JOIN MasterSchemaTable b ON 
  (a.msisdn = b.msisdn) AND 
  (a.classification = b.classification) AND
  (a.event_date_actual = b.event_date_actual);

下面是代码：

    private boolean writeMongoDBMaster(Dataset<Row> slaveSchemaTable,    
    SparkSession sparkSession) {

    if(slaveSchemaTable.limit(1).count() !=0) {
    StringBuilder joinBuilder = new StringBuilder("SELECT b._id as _id,");
    joinBuilder.append("a.msisdn as msisdn,");
    joinBuilder.append("a.classification as classification,");
    joinBuilder.append("a.event_date_actual as event_date_actual,");
    joinBuilder.append("(IFNULL(a.up_vol_mb,0) + IFNULL(b.up_vol_mb,0)) as 
    up_vol_mb,");
    joinBuilder.append("(IFNULL(a.down_vol_mb,0) + 
    IFNULL(b.down_vol_mb,0)) as down_vol_mb,");
    joinBuilder.append("(IFNULL(a.total_vol_mb,0) + 
    IFNULL(b.total_vol_mb,0)) as total_vol_mb ");
    joinBuilder.append("FROM SlaveSchemaTable a LEFT JOIN 
    MasterSchemaTable b ");
    joinBuilder.append("ON (a.msisdn = b.msisdn) AND ");
    joinBuilder.append("(a.classification = b.classification) AND ");
    joinBuilder.append("(a.event_date_actual = b.event_date_actual)");

    Dataset<Row> masterTable = sparkSession.sql(joinBuilder.toString());
    MongoSpark.save(masterTable.write().mode("append"));** 

上面是一个简单的查询，它在适当的连接条件之后获取数据。我只想获取上一个日期的数据。

例如：select ---------------其中event_date_actual =前一天的日期。   event_date_actual为ISO格式。