I am learning Azure and data analytics with Azure. Recently finished learning Postgresql.
My question is if there is an alternative to BIGSERIAL data type for Azure Databases. I ran the query (below the error in the following) and had an error. Note that this datatype exists in Postgresql and hence I am getting confused in Azure. Any alternative to BIGSERIAL?
Failed to execute the query. Error: Column, parameter, or variable #1:
Cannot find data type BIGSERIAL.
create table person (
ID BIGSERIAL NOT NULL PRIMARY KEY,
first_name VARCHAR(50) NOT NULL,
last_name VARCHAR(50) NOT NULL,
email VARCHAR(50),
gender VARCHAR(50) NOT NULL,
date_of_birth DATE NOT NULL,
Country_of_birth VARCHAR(50) NOT NULL
);
In PostgreSQL, the SERIAL keyword is used to setup an auto increment column, this works similar to auto increment in SQL. BIGSERIAL is an auto-incremented Bigint column of 8 bytes.
Closest, I could find "bigserial"in MS docs is as here
So...you can use BIGINT instead, below works fins for me.
create table person (
ID BIGINT NOT NULL PRIMARY KEY,
first_name VARCHAR(50) NOT NULL,
last_name VARCHAR(50) NOT NULL,
email VARCHAR(50),
gender VARCHAR(50) NOT NULL,
date_of_birth DATE NOT NULL,
Country_of_birth VARCHAR(50) NOT NULL
);
Related
CREATE TABLE identity (
empid VARCHAR(255) PRIMARY KEY,
entry VARCHAR(255)
);
-- Table: vectors
CREATE TABLE vectors (
f_id INTEGER PRIMARY KEY IDENTITY(1,1),
label STRING NOT NULL,
empid STRING REFERENCES identity (empid)
NOT NULL,
vector BLOB NOT NULL
);
I tried to run the above query but it gives me error
Incorrect syntax near expected '.', ID or QUOTED_ID.
I don't understand why it is giving me this error, is it because IDENTITY is a keyword in SQL Server. Kindly help!
Try this:
CREATE TABLE [identity] (
empid VARCHAR(255) PRIMARY KEY,
entry VARCHAR(255)
);
-- Table: vectors
CREATE TABLE vectors (
f_id INTEGER PRIMARY KEY IDENTITY(1,1),
label VARCHAR(255) NOT NULL,
empid VARCHAR(255) REFERENCES [identity] (empid)
NOT NULL,
vector VARCHAR(255) NOT NULL
);
Also, if you are working with SQL Server Management Studio, you can see that some words are colored in blue. It will be better to avoid them using in your code as names of tables, variables and other objects. For example, identity is such word.
I'm new to SQL and am following a course, however it does not cover the "create table" part.
It only covers statements etc.
What I would like to have is, my primary key (cust_id) to be generated with the "first_name" and the first 3 letters of "last_name".
I.E. I want "John Smith" to become "custid"; JOHNSMI.
I have below code which works (without composite).
CREATE TABLE NL_client (
custid INT PRIMARY KEY IDENTITY (10000, 1),
userid VARCHAR (50) NOT NULL,
first_name VARCHAR (50) NOT NULL,
last_name VARCHAR (50) NOT NULL,
birthday DATE
);
And I found below code (last line added)
CREATE TABLE SAMPLE_TABLE (
custid INT,
userid VARCHAR (50) NOT NULL,
first_name VARCHAR (50) NOT NULL,
last_name VARCHAR (50) NOT NULL,
PRIMARY KEY (first_name, last_name),
);
However, when trying to execte the second query as displayed above it does not create a Primary key. Or when I execure the below queries;
custid INT PRIMARY KEY (first_name, last_name),
Either above in the query or at the end, it does not make a primary key.
Furthermore, I have no idea, nor was I able to find (perhaps I searched wrongly, surely I'm not the first with this "problem") how to select only the first 3 letters of "last_name" to be used as a part of the "custid".
Perhaps this is not possible and I should use "custerid" as an INT Primary key and use "userid" as a composite.
But it would surely help me in the future to be able to use the Primary Key as a reference in Python.
Many thanks in advance for your help and let me learn to understand why it doesn't work!
CREATE TABLE employees (
id INT NOT NULL auto_increment PRIMARY KEY (ID),
first_name VARCHAR(20) DEFAULT NULL,
last_name VARCHAR(20) DEFAULT NULL,
salary INT DEFAULT NULL);
I think this is correct query to create table in Oracle database.. but it gives the following error:
ORA-00907: missing right parenthesis
How to correct the statement?
You can validate your SQL using formatting tools such as http://www.dpriver.com/pp/sqlformat.htm
auto_increment seems like a proprietary MySQL extension, so it's not valid for Oracle.
also, "id int not null auto_increment primary key (id)" does not need the last "(id)"
Using Oracle, you shoud try something like this
CREATE SEQUENCE seq;
CREATE TABLE employees
(
id INTEGER NOT NULL PRIMARY KEY,
first_name VARCHAR2(20) DEFAULT NULL,
last_name VARCHAR2(20) DEFAULT NULL,
salary INTEGER DEFAULT NULL
);
INSERT INTO employees
VALUES (seq.NEXTVAL,
'name',
'last name',
1);
Sometimes, SQL is fancy, because even having a standard (ANSI), most DBMS vendors add their proprietary extensions to the SQL creating their own languages, so it's rare the situation where you can port one SQL from one DB into another without any changes.
Also, it's a pretty useless error message. It could at least say which position. (also, there's no missing parenthesis, but an unexpected token)
EDITED : New feature 12c
CREATE TABLE employees(
id NUMBER GENERATED ALWAYS AS IDENTITY,
first_name VARCHAR2(30)
etc.
);
Why would you do default null?
The VARCHAR datatype is synonymous with the VARCHAR2 datatype. To avoid possible changes in behavior, always use the VARCHAR2 datatype to store variable-length character strings.
Replace
id INT NOT NULL auto_increment PRIMARY KEY (ID),
with
id INT NOT NULL auto_increment PRIMARY KEY,
this is more efficient
CREATE TABLE EMPLOYEES_T(
ID NUMBER,
FIRST_NAME VARCHAR2(20) DEFAULT NULL,
LAST_NAME VARCHAR2(20) DEFAULT NULL,
SALARY INTEGER DEFAULT NULL,
CONSTRAINT PK_EMPLOYEES_T PRIMARY KEY(ID)
);
I am trying to execute the below query but iam getting the folowing error.
Create table Employee(
Employee_ID char(5)Primary key,
First_Name char(20) NOT NULL,
Last_Name char(20) NOT NULL,
Phone_Number varchar(20) NULL
);
Major Error 0x80040E14, Minor Error 26302
> Create table Employee(
Employee_ID char(5)Primary key,
First_Name char(20) NOT NULL,
Last_Name char(20) NOT NULL,
Phone_Number varchar(20) NULL
)
The specified data type is not valid. [ Data type (if known) = char ]
If the database you are using is some version of Microsoft SQL Server Compact Edition (which the error message would suggest) the error stems from the fact that particular database doesn't support thechar/varchardata types as it's purely unicode based. What you need to do is to use the corresponding unicode data typesnchar/nvarcharlike this:
Create table Employee (
Employee_ID nchar(5) Primary key,
First_Name nchar(20) NOT NULL,
Last_Name nchar(20) NOT NULL,
Phone_Number nvarchar(20) NULL
);
For reference: Data Types Supported in SQL Server CE
I'm getting this error in puTTY. Not sure why, looks right to me ...
psql:pierre.sql:10: ERROR: syntax error at or near "AUTO_INCREMENT"
LINE 2: c_id INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY,
^
psql:pierre.sql:18: ERROR: syntax error at or near "AUTO_INCREMENT"
LINE 2: r_id INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY,
--DROP TABLE customer, reservation;
CREATE TABLE customer(
c_id INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY,
c_ref VARCHAR(30) NOT NULL,
f_name VARCHAR(30) NOT NULL,
l_name VARCHAR(30) NOT NULL,
address VARCHAR(100) NOT NULL,
email VARCHAR(100) NOT NULL,
phone VARCHAR(11) NOT NULL
);
CREATE TABLE reservation(
r_id INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY,
c_id VARCHAR(30) NOT NULL REFERENCES customer(c_id),
book_date DATE NOT NULL CHECK (book_date <= now()),
s_time DOUBLE NOT NULL,
e_time DOUBLE NOT NULL,
amount INTEGER NOT NULL
);
Any ideas why?
auto_increment looks like something you'd use with MySQL.
But, here, it seems you are using PostgreSQL.
According to the datatype serial section of the manual, postgresql's equivalent of auto_increment is serial or bigserial.
Quoting that page :
The data types serial and bigserial are not true types, but merely
a notational convenience for setting up unique identifier columns
(similar to the AUTO_INCREMENT property supported by some other databases).
In Postgres 10 or later consider an IDENTITY column:
CREATE TABLE customer(
c_id INTEGER GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
...
(PRIMARY KEY also makes it NOT NULL automatically.)
Details:
Auto increment table column
In Postgres 9.6 or older consider a serial like Pascal already suggested.
Works in pg 10 or later, too, but IDENTITY is generally superior.