Αποτελέσματα Αναζήτησης
30 Ιουλ 2009 · Oracle cannot query other databases unless a DB link is created. If a DB link exists, as you remarked, you have to do : create tmp_table as select * from prod_schema.table@prod_db
If you would like to create a new table, the first step is to use the CREATE TABLE clause and the name of the new table (in our example: gamer). Then, use the AS keyword and provide a SELECT statement that selects data for the new table.
You can create one table from another by adding a SELECT statement at the end of the CREATE TABLE statement: CREATE TABLE new_tbl [AS] SELECT * FROM orig_tbl; MySQL creates new columns for all elements in the SELECT. For example: mysql> CREATE TABLE test (a INT NOT NULL AUTO_INCREMENT, -> PRIMARY KEY (a), KEY(b))
Use a CREATE TABLE statement to specify the layout of your table: mysql> CREATE TABLE pet (name VARCHAR(20), owner VARCHAR(20), species VARCHAR(20), sex CHAR(1), birth DATE, death DATE); VARCHAR is a good choice for the name , owner , and species columns because the column values vary in length.
9 Ιουν 2023 · The syntax for the SQL create table statement is: CREATE [schema_name.]table_name ( column_name data_type [NULL | NOT NULL] [inline_constraint] [DEFAULT default_value], ... out_of_line_constraints. ); The parameters or values mentioned in this syntax are: schema_name. This is the schema that the table will be created under.
The SQL CREATE TABLE Statement. The CREATE TABLE statement is used to create a new table in a database. Syntax. CREATE TABLE table_name ( column1 datatype, column2 datatype, column3 datatype, .... ); The column parameters specify the names of the columns of the table.
You can create one table from another by adding a SELECT statement at the end of the CREATE TABLE statement: CREATE TABLE new_tbl [AS] SELECT * FROM orig_tbl; MySQL creates new columns for all elements in the SELECT. For example: mysql> CREATE TABLE test (a INT NOT NULL AUTO_INCREMENT, . -> PRIMARY KEY (a), KEY(b)) .
