![]() In this tutorial, you have learned how to use the PostgreSQL LOCALTIMESTAMP function to return the date and time at which the current transaction starts. The LOCALTIMESTAMP function returns a TIMESTAMP value without time zone while the CURRENT_TIMESTAMP function returns a TIMESTAMP with time zone. (1 row) Code language: CSS ( css ) Remarks To get the timestamp of the current transaction with specific fractional seconds precision, you use the precision argument as follows: SELECT LOCALTIMESTAMP( 2) Code language: SQL (Structured Query Language) ( sql ) The following example shows how to get the current date and time of the current transaction: SELECT LOCALTIMESTAMP The LOCALTIMESTAMP function returns a TIMESTAMP value that represents the date and time at which the current transaction starts. The precision argument specifies fractional seconds precision of the second field. The LOCALTIMESTAMP function accepts one argument: The following illustrates the syntax of the LOCALTIMESTAMP function: LOCALTIMESTAMP(precision) This write-up explained what CURRENT_TIMESTAMP is and how to use it in PostgreSQL with examples.The PostgreSQL LOCALTIMESTAMP function returns the current date and time at which the current transaction starts. To extract the date from the timestamp in PostgreSQL, you can use the NOW() function and specify the date data type using the SELECT keyword. However, by omitting the precision parameter, the CURRENT_TIMESTAMP will return the current date, time, and time zone with a full fractional second’s precision. Round the "seconds" fields to specific fractional digits by passing the "precision" argument to the CURRENT_TIMESTAMP function. The CURRENT_TIMESTAMP function retrieves the current date, time, and timezone when a transaction starts. That was all you needed to learn about the Postgres CURRENT_TIMESTAMP() Function. This way, you can specify the CURRENT_TIMESTAMP as a column's default value. Let’s run the SELECT statement to see the data inserted into the publish_article table: SELECT * FROM publish_article īy default, Postgres assigns the current date and time to the publish_date column. The above screenshot clears that we didn’t insert any value in the publish_date column. Two rows have been inserted into the publish_article table successfully. ![]() Now, insert the data into the publish_article table with INSERT INTO command: INSERT INTO publish_article (article_id, article_name) The publish_article table has been created successfully. By default, its value would be the current date and time. A publish_date column having TIMESTAMP data type. An article_name column with the TEXT data type. An article_id column that will accept integer type data. The table consists of three columns whose details are listed below: In this example, we created a “publish_article” table using the CREATE TABLE command. Publish_date TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP) ![]() We created a table named publish_article with three columns article_id, article_name, and publish_date: CREATE TABLE publish_article( The output shows that the seconds are rounded to three decimal points.Įxample #3: How to Set Current TIMESTAMP as a Column’s Default Value? Consequently, we will get the following outcome: In this example, we specified ‘3’ as a precision argument to the CURRENT_TIMESTAMP. ![]() However, you can pass a value as a precision parameter to round the seconds up to specific fractional points: SELECT CURRENT_TIMESTAMP(3) In the above example, you can see that there are six digits after the fractional point in the “seconds” field. The output shows that the CURRENT_TIMESTAMP returns the current date “”, current time “16:07:06.305565” and time zone “07”.Įxample #2: How to Use the CURRENT_TIMESTAMP With the Precision Parameter? Run the below statement to understand the working of the CURRENT_TIMESTAMP function: SELECT CURRENT_TIMESTAMP Now, we will implement the CURRENT_TIMESTAMP function practically to get a better understanding:Įxample #1: What Does CURRENT_TIMESTAMP Function Return? When the precision parameter is omitted, a TIMESTAMP will be returned with a timezone along with full fractional seconds precision. Here, “precision” is an optional parameter used to round the “seconds” fields up to specific fractional digits. How to Use CURRENT_TIMESTAMP Function in PostgreSQL?įirstly, let’s understand the syntax of the CURRENT_TIMESTAMP function: CURRENT_TIMESTAMP() This write-up will present a thorough overview of the Postgres CURRENT_TIMESTAMP function with examples. If we talk about the CURRENT_TIMESTAMP function, it retrieves the current date, time, and timezone when a transaction starts. PostgreSQL offers multiple date/time functions, such as CURRENT_DATE, NOW(), EXTRACT(), CURRENT_TIMESTAMP, etc.
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