The most common data types used in a database table include the following. Data types for columnsĮach column in a table has a data type defined for it. The second defined column, named "column2", is defined as a DATE type of column, meaning it can store date values. The first defined column, named "column1", is defined as a VARCHAR(30) type of column, meaning it can store alphanumeric data up to 30 characters to be stored in that column per row of data. After the CREATE TABLE line, the columns in the table are defined, with parentheses enclosing the column definition code. The table is defined as having two columns in it. The CREATE TABLE line tells the database to create a new table, named as "mytable". An example SQL statement to create a table is shown below. When defining a new table, you must include the name of the table, and you must also define at least one column to be included in the table. The standard date format for input and output is DD-MON-YY e.g., 01-JAN-17 which is controlled by the value of the NLS_DATE_FORMAT parameter.You need to use the Oracle SQL programming code to create a table. It uses fixed-length fields of 7 bytes, each corresponding to century, year, month, day, hour, minute, and second to store date data. Oracle Database has its own propriety format for storing date data. By default, Oracle uses CE date entries if BCE is not used explicitly. It has a range from JanuBCE through DecemCE (Common Era, or ‘AD’). The DATE data type stores the year (which includes the century), the month, the day, the hours, the minutes, and the seconds. The DATE data type allows you to store point-in-time values that include both date and time with a precision of one second. Summary: in this tutorial, you will learn about Oracle DATE data type and how to handle date and time values effectively.
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