| function | return type | describe | example | result |
|---|---|---|---|---|
| abs(x) | absolute value | abs(-17.4) | 17.4 | |
| cbrt(double) | cube root | cbrt(27.0) | 3 | |
| ceil(double/numeric) | the smallest integer not less than the argument | ceil(-42.8) | -42 | |
| degrees(double) | Convert radians to degrees | degrees(0.5) | 28.6478897565412 | |
| exp(double/numeric) | natural index | exp(1.0) | 2.71828182845905 | |
| floor(double/numeric) | largest integer not greater than the argument | floor(-42.8) | -43 | |
| ln(double/numeric) | Natural logarithm | ln(2.0) | 0.693147180559945 | |
| log(double/numeric) | Base 10 logarithms | log(100.0) | 2 | |
| log(b numeric,x numeric) | numeric | the logarithm to the specified base | log(2.0, 64.0) | 6.0000000000 |
| mod(y, x) | take the remainder | mod(9,4) | 1 | |
| pi() | double | "π" constant | pi() | 3.14159265358979 |
| power(a double, b double) | double | Find a to the power of b | power(9.0, 3.0) | 729 |
| power(a numeric, b numeric) | numeric | Find a to the power of b | power(9.0, 3.0) | 729 |
| radians(double) | double | Convert angles to radians | radians(45.0) | 0.785398163397448 |
| random() | double | Random value between 0.0 and 1.0 | random() | |
| round(double/numeric) | round to the nearest integer | round(42.4) | 42 | |
| round(v numeric, s int) | numeric | Round to s decimal places | round(42.438,2) | 42.44 |
| sign(double/numeric) | The sign of the parameter (-1,0,+1) | sign(-8.4) | -1 | |
| sqrt(double/numeric) | square root | sqrt(2.0) | 1.4142135623731 | |
| trunc(double/numeric) | Truncate (towards zero) | trunk (42.8) | 42 | |
| trunk(v numeric, s int) | numeric | truncates digits to s decimal place | trunk(42.438,2) | 42.43 |
PostgreSQL math functions
Guess you like
Origin blog.csdn.net/yeyaozhifengqi/article/details/130389389
Recommended
Ranking