![]() For example, month truncates to the first day of the month. The input timestamp is truncated to the precision of the input datepart. Training=# select ' 12:38:45. Syntax DATETRUNC ( 'datepart', timestamp) Arguments datepart The date part to which to truncate the timestamp value. Gain up to 5x better price performance than any other cloud data warehouse, with performance innovation out of the box at no additional cost to you. 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 Break through data silos and gain real time and predictive insights on all your data in a few clicks, with no data movement or data transformation. 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: The problem with your second example is that when you cast a.visittime to a date type it truncates it to the start of that day (removes the time component). Training=# select date(to_char(20161022,'99999999')) The dateadd function does require an integer for the interval. (1 row) Redshift Convert YYYYMMDD to date format:īelow example demonstrate conversion of date value from ‘YYYYMMDD’ format to date format: (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: training=# select TO_CHAR(TO_DATE( ' 22:30:58','YYYY-MM-DD HH24:MI:SS'),'YYYYMMDD') (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') The DATEADD function in Amazon Redshift is used to add or subtract a specified time interval from a given date.
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