sql server和oracle的常用函数对比（Comparison of commonly used functions of SQL, server and Oracle）.doc

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sql server和oracle的常用函数对比（Comparison of commonly used functions of SQL, server and Oracle）.doc

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sql server和oracle的常用函数对比（Comparison of commonly used functions of SQL, server and Oracle）

sql server和oracle的常用函数对比（Comparison of commonly used functions of SQL, server and Oracle） Comparison of commonly used functions of SQL, Server and Oracle Is a mathematical function 1. absolute value S:select ABS (-1) value O:select, ABS (-1), value, from, dual 2. round (big) S:select ceiling (-1.001) value O:select, ceil (-1.001), value, from, dual 3. round (small) S:select floor (-1.001) value O:select, floor (-1.001), value, from, dual 4. round (interception) S:select cast (-1.002, as, int) value O:select, TRUNC (-1.002), value, from, dual 5., four, five S:select round (1.23456,4) value 1.23460 O:select round (1.23456,4) value from dual 1.2346 6.e is the power of the base S:select Exp (1) value 2.7182818284590451 O:select Exp (1) value from dual 27. take e as the base of the logarithm S:select log (2.7182818284590451) value 1 O:select, ln (2.7182818284590451), value, from, dual; 1 8. take the 10 as the base logarithm S:select log10 (10) value 1 O:select, log (10,10), value, from, dual; 1 9. squares S:select SQUARE (4) value 16 O:select power (4,2) value from dual 16 10. take the square root S:select SQRT (4) value 2 O:select SQRT (4) value from Dual 2 11. seek the power of any number as the base S:select power (3,4) value 81 O:select power (3,4) value from dual 81 12. take the random number S:select rand () value O:select, sys.dbms_random.value (0,1), value, from, dual; 13. take symbols S:select sign (-8) value -1 O:select, sign (-8), value, from, dual, -1 - related trigonometric function 14. pi S:SELECT PI () value 3.1415926535897931 O: doesnt know The 15.sin, cos, and Tan parameters are in radians For example, select sin (PI () /2) value gets 1 (SQLServer) 16.Asin, Acos, Atan, Atan2 return arc 17. radian angle swap (SQLServer, Oracle dont know) DEGREES: arc angle RADIANS: angle radian Comparison between the numerical. 18. find the maximum set S:select max (value) value from (select, 1, value Union Select -2 value Union Select 4, value Union Select, 3,