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CREATE TABLE statement

Creates a FeatureBase table. The table already exists and IF NOT EXISTS is not specified the statement will not be successful.

BNF diagrams

expr

COLUMN_LIST

expr

Type_name

expr

Column_constraint

expr

Table_options

expr

DDL Syntax 

CREATE TABLE
  [IF NOT EXISTS]
  table_name
  (COLUMN_LIST)
  [comment 'comment'];

Arguments

Argument Description Required? Further information
table_name Valid table name Yes Naming standards
IF NOT EXISTS Optional argument that stops statement execution if a table of the same name already exists No  
COLUMN_LIST List of column names, data types and optional constraints. The list must include the _id column Yes * _id column
* Naming standards
* Data types
comment Optional string literal that describes the table No  

Additional information

Naming standards

FeatureBase identifiers (including object names such as databases, tables and columns) start with a lower-case alphabetic character and can include:

  • lower-case alphabetic characters
  • numbers 0-9

  • dash - and underscore _ characters.

  • table names can be up to 230 characters in length

  • column names can be up to 64 characters in length

_id column

The table ID column (_id) is used as the table primary key and must uniquely represent a record in your table.

UI Type SQL data type Data source table unique key
Number id Positive integer
String string String key or a combination of columns used to create a unique key

Examples

CREATE TABLE with decimal data type 

create table products
  (_id id, prodlist string, price decimal(2) stock int);
create table services
  (_id id, servicelist string, price decimal(2));

CREATE TABLE with integer constraints 

create table doctest
  (
    _id id,
    numbers int min -991 max 991,
    words string
  );

CREATE TABLE with all column types 

create table allcoltypes
  (
    _id id,
    intcol int min 0 max 10000,
    boolcol bool,
    timestampcol timestamp timeunit 'ms',
    decimalcol decimal(2),
    stringcol string,
    stringsetcol stringset,
    stringsetcolq stringsetq timequantum 'YMD' ttl '24h',
    idcol id,
    idsetcol idset,
    idsetcolq idsetq timequantum 'YMD' ttl '24h'
  )
  comment 'table containing all column types';

Further information