What is identity column in Sybase?
An IDENTITY column contains a value for each row, generated automatically by Adaptive Server, that uniquely identifies the row within the table. Each table can have only one IDENTITY column.
What are database identifiers?
An identifier is the representation within the language of items created by the user, as opposed to language keywords or commands. Some identifiers stand for dictionary objects, which are the objects you create- such as tables, views, indexes, columns, and constraints- that are stored in a database.
What is Sp_help in Sybase?
Use sp_help to display information about a specified database object (that is, any object listed in sysobjects), a specified datatype (listed in systypes), or all objects and datatypes in the current database.
How do I create a sequence in Sybase?
Parameters
- OR REPLACE clause – Specifying OR REPLACE creates a new sequence, or replaces an existing sequence with the same name.
- INCREMENT BY clause – Defines the amount the next sequence value is incremented from the last value assigned.
- START WITH clause – Defines the starting sequence value.
How do I create a primary key in Sybase?
Creating a primary key in Sybase Central Click the Tables folder for that database. Right-click the table you wish to modify, and select Properties from the pop-up menu to display its property sheet. Click the Columns tab, select the column name, and either click Add to Key or Remove from Key.
What is the use of Sp_help?
The sp_help procedure looks for an object in the current database only. When name is not specified, sp_help lists object names, owners, and object types for all objects in the current database.
What is exec Sp_help?
Sp_help is a system stored procedure that is similar to a ‘help’ command that is issued at a command prompt. This procedure is extremely useful in the database because almost any discreet object can be passed as a parameter in order to return back detailed information regarding the object.
How do I change primary key in Sybase?
Configure a primary key using Sybase Central
- Connect to the database using the SQL Anywhere 12 plug-in.
- In the left pane, double-click Tables.
- Right-click the table and click Set Primary Key.
- Follow the instructions in the Set Primary Key Wizard.
What are rules of identifiers?
A valid identifier can have letters (both uppercase and lowercase letters), digits and underscores. The first letter of an identifier should be either a letter or an underscore. You cannot use keywords like int , while etc.
What is Sp_tables?
sp_tables is equivalent to SQLTables in ODBC. The results returned are ordered by TABLE_TYPE, TABLE_QUALIFIER, TABLE_OWNER, and TABLE_NAME.
How can I get table column names and data types in Sybase?
You can use built-in procedure sp_columns. It will return all the table metadata including column name, data type, column length etc.