September 2024
Intermediate to advanced
522 pages
14h 52m
Spanish
Content preview from Google BigQuery: La Guía Definitiva
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Capítulo 3. Tipos de datos, funciones y operadores
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En las consultas de alquiler de bicicletas de los capítulos anteriores, cuando dividimos la duración del viaje por 60, pudimos hacerlo porque la duración del viaje era de tipo numérico. Intentar dividir el género entre 60 no habría funcionado porque el género es una cadena. Las funciones y operaciones que tienes a tu disposición pueden estar restringidas en función del tipo de datos a los que las apliques.
BigQuery admite varios tipos de datos para almacenar datos numéricos, de cadenas, temporales, geográficos, estructurados y semiestructurados :
INT64- Es el único tipo entero. Puede representar números que van aproximadamente de 10-19 a1019. Para los números de valor real, utiliza
FLOAT64, y para los booleanos,BOOL. NUMERICNUMERICofrece 38 dígitos de precisión y 9 dígitos decimales de escala y es adecuado para cálculos exactos, como en finanzas.STRING- Es un tipo de primera clase y representa secuencias de longitud variable de caracteres Unicode.
BYTESson secuencias de longitud variable de caracteres (no Unicode). TIMESTAMP- Esto representa un punto absoluto en el tiempo.
DATETIME- Este representa una fecha y hora de calendario.
DATEyTIMEtambién están disponibles por separado. GEOGRAPHYGEOGRAPHYrepresenta puntos, líneas y polígonos en la superficie de la Tierra.STRUCTyARRAY- Consulta la descripción para ...
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