Create Table SQL Statement
What is the syntax of CREATE TABLE in Oracle? Since the syntax of CREATE TABLE statement can be very flexible and complicated, so using text-based… Read More »Create Table SQL Statement
Constraint
Toad Create Table Example
How to create a table in Oracle step by step? To create a new table, we can choose to compose a hand-writing PL/SQL statement which… Read More »Toad Create Table Example
PL/SQL Developer Create Table Example
How to create a new table in Oracle? To create a new table, we can choose to compose a hand-writing PL/SQL statement which may be… Read More »PL/SQL Developer Create Table Example
SQL Developer Create Table Example
How do I create a new table in Oracle? To create a new table, we can choose to compose a hand-writing SQL statement which may… Read More »SQL Developer Create Table Example
How to Resolve ORA-12991 Error Message
ORA-12991: column is referenced in a multi-column constraint ORA-12991 means that the column you want to drop is bound to some multi-column constraints. You must… Read More »How to Resolve ORA-12991 Error Message
How to Drop Primary Key in Oracle
Drop Primary Key Primary key is sort of a constraint rather than an index, you should treat it as a constraint first so as to… Read More »How to Drop Primary Key in Oracle
How to Add Primary Key in Oracle
Add Primary Key There're 3 basic ways to create a primary key for a table. 1. System-Generated Name You don't have to provide a name… Read More »How to Add Primary Key in Oracle
How to Resolve ORA-01400: cannot insert NULL into
ORA-01400 ORA-01400 means that there's a column which was found as NOT NULL is not listed in the INSERT statement, you have to provide a… Read More »How to Resolve ORA-01400: cannot insert NULL into
How to Resolve ORA-00904 Invalid Identifier
ORA-00904 ORA-00904 means that you used an invalid identifier to be a column name, which is most likely unmatched in name or incorrect syntax. Since… Read More »How to Resolve ORA-00904 Invalid Identifier