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se define en el constructo create table.
it is defined in the create table construct.

por ejemplo, en la siguiente instrucción, create table customer
so, if the table already contains the following rows:

create table este comando permite crear una tabla con sus columnas.
create table this command creates a table with its columns.

antes de sumergirnos en la sintaxis sql para create table, es una buena idea comprender lo que se incluye en una tabla.
therefore, the create table statement is one of the most fundamental components of sql.

create table "tabla1" ("id" integer)
create table "table1" ("id" integer)

create table otro comando muy importante, el de creación de la tabla y sus columnas, vamos a ver que tipos de datos podemos tratar :
create table another important command, the creation of a table and its columns, let us see now the type of data that can be handle:

create table "tabla1" ("id" integer auto_increment)
create table "table1" ("id" integer auto_increment)

las claves primarias pueden especificarse cuando se crea la tabla (utilizando create table) o cambiando la estructura existente de la tabla (utilizando alter table).
primary keys can be specified either when the table is created (using create table) or by changing the existing table structure (using alter table).

en este diálogo puede digitar únicamente comandos administrativos, tales como grant, create table, o drop table, y no comandos de filtrado. el comando que digite dependerá del origen de datos, por ejemplo, dbase solo admite algunos comandos sql de los listados aquí.
you can only enter administration commands in this dialog, such as grant, create table, or drop table, and not filter commands. the commands that you can enter depend on the data source, for example, dbase can only run some of the sql commands list here.

country divorces population per 1000 persons (thousands) portugal 3.10 10 266 maybe, you could hurriedly decide to get the whole amount of portugal's population by doing: 10 266 * 1000 = 10 266 000 people but that would be a waste of time, because later when you had to apply the rule of three: if there are 3.10 divorces per 1000 persons, there will be x divorces per 10 266 000 people x = 10:266 000 * 3.10 / 1000 so you would have to divide by 1000, after having multiplied by 1000 - both opposite operations can be simplified. therefore, paying more attention to our table from the beginning, we can observe that the figure of divorces is expressed 'per 1000 persons', which is exactly the same order of magnitude, 'thousands', that we have in the column of population, so we only need to directly multiply both figures to obtain the number of divorces (thank you for this little present, epso!). 3.10 * 10 266 = 31 825. so option b) is the right one. anyway, you can verify that your multiplication magnitudes is also right: 3.10 divorces / #husband people * 10 266 #thousand people = = 31 825 divorces 81
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