spark sql date functions

SQL statement for date addition Query This is an SQL statement that describes the date addition of mssql access. It provides a large number of functions for database tutorial date operations. Today, we use the dateadd function to

(INTERVAL,DATE1,DATE2)--Returns the difference between Date2 and date1 two dates in interval specified mode date2-date1DATEADD (interval,number,date)--The date after number is added in the way specified by intervalDatePart (interval,date)---Returns the integer value corresponding to the specified portion of the date,

use of the functions described above:SELECT sysdate from DUAL;Output: 08/31/2014 5:25:34 PMSELECT to_char (current_date, ' dd-mm-yyyy HH:MI:SS ') from DUAL;Output: 31-08-2014 05:26:14SELECT add_months (Sysdate, 5) from DUAL;Output: 01/31/2014 5:26:31 PMSELECT Localtimestamp from DUAL;Output: 8/31/2014 5:26:55.347000 PMThree, interval data types and functionsThe following are the interval data types:　　INTERVAL years to month-it stores a period of time

SQL Date: when we work on dates, the hardest task is to ensure that the date you insert is formatted to match the format of the date column in the database. As long as the data contains only the date parts, running the query will not be a problem. However, if time is involve

SQL stored procedures often need to call some functions to make the processing process more reasonable and make the function more reusable. However, you may find that when writing SQL functions, some functions are written under the table value function and some are written u

; The function in MySQL is length ():SELECT LENGTH(column_name) from table_name; // Choose the length of the value in the "name" and "url" columns from the "Websites" table: as Lengthofurl from Websites; 5. ROUND () function The ROUND () function is used to round a numeric field to the specified number of decimal digits. Syntax: SELECT ROUND (column_name,decimals) from table_name; Parameters are required: (1) The field to be rounded, and (2) specify the number of decimal digits to be

I. SQL Server Date and Time FunctionsDate and time functions in SQL Server1. Current System Date and TimeSelect getdate ()2. dateadd returns a new datetime value based on a period of time added to the specified date.For example, add 2 days to the dateSelect dateadd (day, 2,

Differences between SQL table valued functions and scalar functions When writing SQL stored procedures, you often need to call some functions to make the processing process more reasonable and make the function more reusable. However, you may find that when writing

Function Functions used in queries In a query statement, you can query not only the values of the columns in the table but also the different types of information in the database using internal functions. You can use an intrinsic function in the select list, where clause, and any expression that allows it. These functions are all an extension of T-

): 05-16-2006 Select CONVERT (varchar), GETDATE (), 111): 2006/05/16 Select CONVERT (varchar), GETDATE (), 112): 20060516 Select CONVERT (varchar), GETDATE (), 113): 16 05 2006 10:57:49:513 Select CONVERT (varchar), GETDATE (), 114): 10:57:49:547 Select CONVERT (varchar), GETDATE (), 120): 2006-05-16 10:57:49 Select CONVERT (varchar), GETDATE (), 121): 2006-05-16 10:57:49.700 Select CONVERT (varchar), GETDATE (), 126): 2006-05-16t10:57:49.827 Select CONVERT (varchar), GET

Anonymous PL/SQL block reviewDECLARE (optional) defines the object to be used in a PL/SQL block BEGIN (MUST) EXECUTE statement EXCEPTION (optional) error-handling statement END; Must Anonymous blocks (starting with declare or begin) are compiled each time they are used. anonymous blocks are not stored in the database, and they cannot be called from other PL/SQL