POSTGRESQL CAST DECIMAL TO INTEGER HOW TO
POSTGRESQL CAST DECIMAL TO INTEGER CODE

Some test cases to demonstrate: db=> select CAST((COALESCE(NULL,'0')) AS INTEGER) ĭb=> select CAST((COALESCE('','0')) AS INTEGER) ĭb=> select CAST((COALESCE('4','0')) AS INTEGER) ĭb=> select CAST((COALESCE('bad','0')) AS INTEGER) ĮRROR: invalid input syntax for integer: 'bad'

Postgres=# select (extract('epoch' from now()) - extract('epoch' from timestamp ''))/3600.0/24.I had the same sort of need and found this to work well for me (postgres 8.4): CAST((COALESCE(myfield,'0')) AS INTEGER) postgres=# select extract('epoch' from now()) - extract('epoch' from timestamp '') Correct: After the time is converted to epoch time, the two epoch values subtract again. Such an algorithm causes the result to be inconsistent with the expectation.Ģ. The integer is multiplied by this level and converted into the constant coefficient of the lower level.ĭoes the epoch of 0.584 years equal 210 days? postgres=# select 0.584*12 Īfter erasing the decimals, you get six months or seven months. If it is not an integer, it needs to be converted into a lower-level integer. Mins * ((int64) SECS_PER_MINUTE * USECS_PER_SEC) +Įach unit is an integer. Or we can simply concatenate the number with the percentage sign, either with the CONCAT() function or with the concatenation operator.

POSTGRESQL CAST DECIMAL TO INTEGER HOW TO

We can use the TOCHAR() function to format the number along with the percentage sign. Shows you how to use PostgreSQL CAST to convert from one data type into another e.g., a string into an integer, a string to date, a string to double etc. Result->time = hours * ((int64) SECS_PER_HOUR * USECS_PER_SEC) + We have several options if we want to display numbers with a percentage sign in PostgreSQL. Result->month = years * MONTHS_PER_YEAR + months Result = (Interval *) palloc(sizeof(Interval)) (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), See the following example: SELECT TONUMBER ( '1,234,567. 99 in the format string, the TONUMBER () function will not parse the part after the decimal place.

POSTGRESQL CAST DECIMAL TO INTEGER CODE

* inputs as well, but it's not entirely clear what limits to apply. 1 Answer Sorted by: 48 There are two ways to typecast in Postgres: You either do it the SQL standard way: select cast (3.141593 as bigint) or you could use the Postgres-specific cast operator: :: select (3.141593 :: bigint) You might also want to consider the various rounding functions. 89 (1 row) Code language: CSS (css) C) Format control If you don’t specify. * make_interval - numeric Interval constructor Postgres=# select extract('epoch' from interval '0.584 year')/3600/24.0 ĭoes the epoch of one year equal 365.25 days?ĭoes the epoch of 0.5 years equal 180 days?ĭoes the epoch of 0.583 years equal 180 days?ĭoes the epoch of 0.584 years equal 210 days? Postgres=# select extract('epoch' from interval '0.5 year')/3600/24.0 One key thing to remember is that a successful conversion occurs when the target data type is compatible with the expression. Postgres=# select extract('epoch' from interval '1 year')/3600/24.0 1 2 SELECT CAST ('500' AS INTEGER) This illustration cast the string type 500 into and integer type 500. Since numeric has a strictly defined precision, attempting to assign to it a value with infinitely many digits after the decimal point (which 100/3 produces), without rounding, will result in truncation. When interval type is converted to epoch, the algorithm may not match the expected one: postgres=# select extract('epoch' from interval '0.01 year')/3600/24.0 When one of the operands is numeric and another one integer, the integer operand will be cast to numeric and the result will be numeric. I have tried these two statements, but just havent found any real example on how to really do it. Error: Time subtraction and conversion to the epoch (seconds) I am attempting to convert a PostgreSQL table column from integer to money, but I am receiving the error: cannot cast type M圜olumn to money.

This function computes the interval between two timestamps and converts the result to a value in seconds or days.ġ.

Postgresql cast decimal to integer