You can also use ::date, ::time, ::timestamp after values value to convert it to proper format to compare with other column.įor example, select CASE WHEN col1::date = col2 then “Mathing” ELSE “Not Matching” END FROM somedbtable You must explicitly type cast the values to perform the comparison. The type of the SQL comparison parameter must match the type of the column in the database table.įor examples, you cannot use a DATE variable when the target column is a DATETIME. (1 row Using Redshift DATE and DATETIME variables in SQL Comparison Statements Below example demonstrates usage of TIMEZONE function: training=# select TIMEZONE ('GMT',now() ) If you have timezone values, you can use TIMEZONE function to convert timezone value to timestamp. (1 row) Convert Redshift timezone value to timestamp format: (1 row) Redshift Convert YYYYMMDD to date format:īelow example demonstrate conversion of date value from ‘YYYYMMDD’ format to date format: training=# select date(to_char(20161022,'99999999')) (1 row) Redshift Date Format Conversion ExamplesĬonvert Redshift timestamp to YYYYMMDD format: Below example demonstrate conversion of date value to ‘YYYYMMDD’ format using to_char and to_date function:
For example, to find the difference between two dates in weeks, use the below statement. This function takes two date values and returns the difference between them in the unit specified by the ‘date part’ argument. (1 row) Convert a String to timestamp format using TO_TIMESTAMP() Functionīelow is the example to use Redshift TO_TIMESTAMP function to convert string having date time to Redshift timestamp format: training=# Select to_timestamp('', 'DD Mon YYYY') Redshift Date functions: DATEDIFF function. Commonly used Amazon Redshift Date Functions and ExamplesĬonvert a String to Date format using TO_DATE() Functionīelow is the example to use Redshift TO_DATE function to convert string having date to date format: training=# Select TO_DATE( ' 23:45:58','YYYY-MM-DD HH24:MI:SS').Redshift NVL and NVL2 Functions with Examples In Redshift, you can use datetrunc () (See online documentation ).Different Redshift Join Types and Examples.You can use the Redshift date format functions to convert the string literals, integer, date/time etc to required format. You can directly convert the format by specifying the cast operator ( ‘::’) such as ::date, ::time, ::timestamp after the date string literal.
Datetrunc redshift iso#
Amazon Redshift accepts different date formats, including ISO date time strings. Redshift can convert quoted date strings values to datetime data type. TIMESTAMP: for year, month, day, hour, minute, second, fraction (includes 6 decimal positions).TIMESTAMPTZ: same as TIME, also includes time zone information.TIME: for hour, minute, second, fraction with (includes 6 decimal positions).
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