SQL

Sequences

CREATE SEQUENCE Syntax — Let us create a sequence View a Sequence SELECT *FROM SYS.SEQ$; eXAMPLE 2 Finding the next value of a sequence: Example Inserting sequence values into a table: Example This example increments the employee sequence and uses its value for a new employee inserted into the sample table hr.employees: https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlrf/Sequence-Pseudocolumns.html

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TO_DSINTERVAL

TO_DSINTERVAL converts its argument to a value of INTERVAL DAY TO SECOND data type. TO_DSINTERVAL accepts argument in one of the two formats: EXAMPLE 1 The following example uses the SQL format to select from the hr.employees table the employees who had worked for the company for at least 100 days on November 1, 2002: EXAMPLE 2 https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlrf/TO_DSINTERVAL.html#GUID-DEBB41BD-9438-4558-A53E-428CE93C05D3

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TO_YMINTERVAL

TO_YMINTERVAL converts its argument to a value of INTERVAL MONTH TO YEAR data type. For the argument, you can specify any expression that evaluates to a character string of CHAR, VARCHAR2, NCHAR, or NVARCHAR2 data type. EXAMPLE The following example calculates for each employee in the sample hr.employees table a date one year two months after the hire date:

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