Technical Development - Tiveloper.

VARCHAR2(size) : Variable-length character data size : minimum 1 and maximum 4000 CHAR(size) : Fixed-length character data size : minimum 1 and maximum 2000 (slowest data type) NUMBER(p,s) : Variable-length numeric data p : precision , s: scale The precision is the total number of decimal digits, and the scale is the number of digits to the right fo the decimal point; the precision can range fro..

VARCHAR2(size) : Variable-length character data size : minimum 1 and maximum 4000 CHAR(size) : Fixed-length character data size : minimum 1 and maximum 2000 (slowest data type) NUMBER(p,s) : Variable-length numeric data p : precision , s: scale The precision is the total number of decimal digits, and the scale is the number of digits to the right fo the decimal point; the precision can range fro..

CREATE TABLE[schema.]table (column datatype [DEFAULT expr][, ...]); schema is the same as the owner's name.

CREATE TABLE[schema.]table (column datatype [DEFAULT expr][, ...]); schema is the same as the owner's name.

Table : Basic unit of storage; composed of rows Can be created at any time. View : Logically represents subsets of data from one or more tables Sequence : Generates numeric values Index : Imporves the performance of some queries Synonym : Gives alternative names to object

Table : Basic unit of storage; composed of rows Can be created at any time. View : Logically represents subsets of data from one or more tables Sequence : Generates numeric values Index : Imporves the performance of some queries Synonym : Gives alternative names to object

A third command is available in iSQLplus. The AUTOCOMMIT command can be toggled on or off. If set to on , each individual DML statement is committed as soon as it is executed. You cannot roll back the changes. I set of off , the COMMIT statement can still be issued explicitly. Also, the COMMIT statement is issued when a DDL statement is issued or when you exit iSQLplus.

A third command is available in iSQLplus. The AUTOCOMMIT command can be toggled on or off. If set to on , each individual DML statement is committed as soon as it is executed. You cannot roll back the changes. I set of off , the COMMIT statement can still be issued explicitly. Also, the COMMIT statement is issued when a DDL statement is issued or when you exit iSQLplus.

An automatic commit occurs under the following circumstances: - DDL statement is issued - DCL statement is issued - Normal exit from iSQL plus , without explicitly issuing COMMIT or ROLLBACK statements An autumatic rollback occurs under an abnormal termination of iSQLplus or a system failure.

An automatic commit occurs under the following circumstances: - DDL statement is issued - DCL statement is issued - Normal exit from iSQL plus , without explicitly issuing COMMIT or ROLLBACK statements An autumatic rollback occurs under an abnormal termination of iSQLplus or a system failure.