Qual è l’edificio più alto del mondo? September 29, 2023, 2:51 am Di tendenza ora Il 98% dei viaggiatori non riconosce le banconote locali The maximum number of unique for a given group. The number of unique objects for that group is calculated. This method allows for estimating unique counts for multiple groupings, reducing the overall query time. For example, if you have a table of customer transactions, you might want to know how many unique products each customer bought, how many unique customers visited each store, and how many unique products were sold in each region. Instead of running three separate COUNT(DISTINCT …) queries, you can run one `estimate_distinct_count_for_multiple_groups` query. **Parameters:** * `table_name`: The name of the table to query. * `group_by_columns`: A list of column names to group by. Each element in the list can be either a string (representing a single column) or a tuple of strings (representing multiple columns that should be treated as a single grouping unit). * `count_distinct_column`: The name of the column for which to count distinct values within each group. * `error_rate`: (Optional) The desired error rate for the HyperLogLog++ algorithm. This value should be between 0 and 1. A smaller error rate results in more accurate estimates but may require more memory. Defaults to 0.01. **Returns:** A list of dictionaries, where each dictionary represents a grouping and contains the following keys: * `group_by_key`: A string representation of the column(s) used for grouping. * `estimated_distinct_count`: The estimated number of distinct values for the `count_distinct_column` within that group. **Example Usage:** python from google.cloud import bigquery client = bigquery.Client() # Example table with customer transactions table_id = Solo 1 su 20 veri guerrieri della strada sa nominare tutti questi iconici camper RV Sei una leggenda? Solo i fan dei viaggi di lusso possono identificare questi 40 hotel iconici Riesci a identificare tutta l’attrezzatura da pesca? Dimostra di essere un vero pescatore Solo i veri cuochi over 50 ottengono il 100% in questo quiz sui nomi delle pentole: sei ufficialmente una leggenda della cucina? Solo i collezionisti di monete over 50 possono superare questo test… I neofiti stiano alla larga! Pensi di conoscere la musica? Solo il 3% riesce a nominare tutti e 40 questi strumenti musicali comuni… Tu ci riesci? Solo per gli amanti del vintage: sai nominare questo classico design del marchio anni ’80? Pensi di essere disciplinato? L’80% non riesce nemmeno a superare i corsi universitari online per mancanza di autocontrollo. torna su
Il 98% dei viaggiatori non riconosce le banconote locali The maximum number of unique for a given group. The number of unique objects for that group is calculated. This method allows for estimating unique counts for multiple groupings, reducing the overall query time. For example, if you have a table of customer transactions, you might want to know how many unique products each customer bought, how many unique customers visited each store, and how many unique products were sold in each region. Instead of running three separate COUNT(DISTINCT …) queries, you can run one `estimate_distinct_count_for_multiple_groups` query. **Parameters:** * `table_name`: The name of the table to query. * `group_by_columns`: A list of column names to group by. Each element in the list can be either a string (representing a single column) or a tuple of strings (representing multiple columns that should be treated as a single grouping unit). * `count_distinct_column`: The name of the column for which to count distinct values within each group. * `error_rate`: (Optional) The desired error rate for the HyperLogLog++ algorithm. This value should be between 0 and 1. A smaller error rate results in more accurate estimates but may require more memory. Defaults to 0.01. **Returns:** A list of dictionaries, where each dictionary represents a grouping and contains the following keys: * `group_by_key`: A string representation of the column(s) used for grouping. * `estimated_distinct_count`: The estimated number of distinct values for the `count_distinct_column` within that group. **Example Usage:** python from google.cloud import bigquery client = bigquery.Client() # Example table with customer transactions table_id =
Solo 1 su 20 veri guerrieri della strada sa nominare tutti questi iconici camper RV Sei una leggenda?
Solo i veri cuochi over 50 ottengono il 100% in questo quiz sui nomi delle pentole: sei ufficialmente una leggenda della cucina?
Pensi di conoscere la musica? Solo il 3% riesce a nominare tutti e 40 questi strumenti musicali comuni… Tu ci riesci?
Pensi di essere disciplinato? L’80% non riesce nemmeno a superare i corsi universitari online per mancanza di autocontrollo.
