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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Right... Good call. In that case, the sales table should have a default for the department id field set to 0, and then the unknown row would have an ID of 0
Because id cannot be null in table departments (cause PK), then no values will be provided for result.
If the db is built properly, the departments table would have a null row that would have the name "Unknown"
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Suggestion,
it is not advisable to use
*,use the position and not the name of the field in "order by" to make it more efficient.
Thanks, I hope I understood you correctly :)
sugerencia,no es recomendable usar *, en el order by para que sea mas eficiente usar la posicion y no el nombre del campo.
use dos tipos de solucion una iterativa usando bucles y otra recursiva.
Initialize your variables with the first value of the array