Here, the SQL command checks if a table namedCompaniesexists, and if not, it creates a table with specified columns. Create Table Using Another Existing Table In SQL, we can create a new table by duplicating an existing table's structure. Let's look at an example. -- create a backup t...
Visual FoxPro uses the default value if you use the SQL ALTER TABLEcommand to remove autoincrementing for the field.PRIMARY KEY | UNIQUE PRIMARY KEY creates a primary index for the field specified in FieldName1. UNIQUE creates a candidate index for the field specified in FieldName1. The ...
The following example creates a new database named MyData1 and usesCREATE TABLEto create three tables: Salesman, Customer, and Orders. The FOREIGN KEY and REFERENCES clauses in the secondCREATE TABLEcommand create a persistent one-to-many relationship between the Salesman and Customer tables. The...
Like the primary key definition, you can declare a foreign key both inline and out of line in the SQL Create Table command. Inline foreign keys are declared like this: CREATEtable_name(column_name data_typeREFERENCESother_table_name(other_column_name),...); You use the word REFERENCES, th...
Example 1 The following example creates a new database namedmydata1and usesCREATE TABLEto create three tables:Salesman,Customer, andOrders. TheFOREIGN KEYandREFERENCESclauses in the secondCREATE TABLEcommand create a persistent one-to-many relationship between theSalesmanandCustomertables. TheDEFAULTclau...
Example 1 The following example creates a new database named mydata1 and uses CREATE TABLE to create three tables: Salesman, Customer, and Orders. The FOREIGN KEY and REFERENCES clauses in the second CREATE TABLE command create a persistent one-to-many relationship between the Salesman and Cust...
Anytime you want to add a new table to the database you would use the SQL CREATE TABLE statement. How To Use the SQL CREATE TABLE StatementThe SQL CREATE TABLE command is used as follows. SQL CREATE TABLE Statement Syntax CREATE TABLE <table_name> ( <column_name1> <datatype1> <...
CREATE TABLE TheCREATE TABLEcommand creates a new table in the database. The following SQL creates a table called "Persons" that contains five columns: PersonID, LastName, FirstName, Address, and City: ExampleGet your own SQL Server CREATETABLEPersons (...
(MCD) feature, run this command to change the database's compatibility level to AUTO. For example:ALTER DATABASE SCOPED CONFIGURATION SET DW_COMPATIBILITY_LEVEL = AUTO;Existing MCD tables will stay but become unreadable. Queries over MCD tables will return this error:Related table/view is not ...
example. sqliteConnect --connectionString "Data Source=${databaseFile};Version=3;UseUTF16Encoding=True;" dbConnection=connection // Runs the CREATE TABLE query. sqlExecute --connection ${dbConnection} --statement "CREATE TABLE sample_table(\r\n sample_column TEXT,\r\n identifier INTEGER,\r\...