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Actualizar columna de texto, agregar/eliminar texto en el índice de caracteres

¿Cómo puedo actualizar una columna de texto, agregando y/o eliminando texto en medio de la cadena?

Ejemplos

  • Agregue "abc" a "0123456" en el índice 3, para hacer "012abc3456"
  • Eliminar el índice 3 al índice 5 de "0123456", para hacer "0126"
over 4 years ago · Santiago Trujillo
1 answers
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0

Puedes usar overlay para el primero:

 select overlay('0123456' placing 'abc' from 4 for 0)

Y para el segundo también:

 select overlay('0123456' placing '' from 4 for 3)
over 4 years ago · Santiago Trujillo Report
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