What's wrong, I cannot create this table - sql

Question

That's my first time using Firebird. I am trying to create this table. I checked the docs and it seems ok. What's wrong?
CREATE TABLE ENDERECO
(
ID_ENDERECO INTEGER generated by default as identity primary KEY,
RUA VARCHAR(50),
BAIRRO VARCHAR(35),
CEP VARCHAR(10),
COMPLEMENTO VARCHAR(35),
ECOMERCIO INTEGER(1),
ESTADO CHAR(2)
)

Answer 1

The problem is your use of INTEGER(1). The data type INTEGER (and SMALLINT and BIGINT) do not have a precision in their definition. See also Data Type Declaration Syntax in the Firebird 3 Language Reference:
<domain_or_non_array_type> ::=
<scalar_datatype>
| <blob_datatype>
| [TYPE OF] domain
| TYPE OF COLUMN rel.col
<scalar_datatype> ::=
SMALLINT | INT[EGER] | BIGINT
| FLOAT | DOUBLE PRECISION
| BOOLEAN
| DATE | TIME | TIMESTAMP
| {DECIMAL | NUMERIC} [(precision [, scale])]
| {VARCHAR | {CHAR | CHARACTER} VARYING} (length)
[CHARACTER SET charset]
| {CHAR | CHARACTER} [(length)] [CHARACTER SET charset]
| {NCHAR | NATIONAL {CHARACTER | CHAR}} VARYING (length)
| {NCHAR | NATIONAL {CHARACTER | CHAR}} [(length)]
In short, use:
CREATE TABLE ENDERECO
(
ID_ENDERECO INTEGER generated by default as identity primary KEY,
RUA VARCHAR(50),
BAIRRO VARCHAR(35),
CEP VARCHAR(10),
COMPLEMENTO VARCHAR(35),
ECOMERCIO INTEGER,
ESTADO CHAR(2)
)