func_math.result
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:8k
- drop table if exists t1;
- select floor(5.5),floor(-5.5);
- floor(5.5) floor(-5.5)
- 5 -6
- explain extended select floor(5.5),floor(-5.5);
- id select_type table type possible_keys key key_len ref rows Extra
- 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
- Warnings:
- Note 1003 select floor(5.5) AS `floor(5.5)`,floor(-(5.5)) AS `floor(-5.5)`
- select ceiling(5.5),ceiling(-5.5);
- ceiling(5.5) ceiling(-5.5)
- 6 -5
- explain extended select ceiling(5.5),ceiling(-5.5);
- id select_type table type possible_keys key key_len ref rows Extra
- 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
- Warnings:
- Note 1003 select ceiling(5.5) AS `ceiling(5.5)`,ceiling(-(5.5)) AS `ceiling(-5.5)`
- select truncate(52.64,1),truncate(52.64,2),truncate(52.64,-1),truncate(52.64,-2), truncate(-52.64,1),truncate(-52.64,-1);
- truncate(52.64,1) truncate(52.64,2) truncate(52.64,-1) truncate(52.64,-2) truncate(-52.64,1) truncate(-52.64,-1)
- 52.6 52.64 50 0 -52.6 -50
- explain extended select truncate(52.64,1),truncate(52.64,2),truncate(52.64,-1),truncate(52.64,-2), truncate(-52.64,1),truncate(-52.64,-1);
- id select_type table type possible_keys key key_len ref rows Extra
- 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
- Warnings:
- Note 1003 select truncate(52.64,1) AS `truncate(52.64,1)`,truncate(52.64,2) AS `truncate(52.64,2)`,truncate(52.64,-(1)) AS `truncate(52.64,-1)`,truncate(52.64,-(2)) AS `truncate(52.64,-2)`,truncate(-(52.64),1) AS `truncate(-52.64,1)`,truncate(-(52.64),-(1)) AS `truncate(-52.64,-1)`
- select round(5.5),round(-5.5);
- round(5.5) round(-5.5)
- 6 -6
- explain extended select round(5.5),round(-5.5);
- id select_type table type possible_keys key key_len ref rows Extra
- 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
- Warnings:
- Note 1003 select round(5.5,0) AS `round(5.5)`,round(-(5.5),0) AS `round(-5.5)`
- select round(5.64,1),round(5.64,2),round(5.64,-1),round(5.64,-2);
- round(5.64,1) round(5.64,2) round(5.64,-1) round(5.64,-2)
- 5.6 5.64 10 0
- select abs(-10), sign(-5), sign(5), sign(0);
- abs(-10) sign(-5) sign(5) sign(0)
- 10 -1 1 0
- explain extended select abs(-10), sign(-5), sign(5), sign(0);
- id select_type table type possible_keys key key_len ref rows Extra
- 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
- Warnings:
- Note 1003 select abs(-(10)) AS `abs(-10)`,sign(-(5)) AS `sign(-5)`,sign(5) AS `sign(5)`,sign(0) AS `sign(0)`
- select log(exp(10)),exp(log(sqrt(10))*2),log(-1),log(NULL),log(1,1),log(3,9),log(-1,2),log(NULL,2);
- log(exp(10)) exp(log(sqrt(10))*2) log(-1) log(NULL) log(1,1) log(3,9) log(-1,2) log(NULL,2)
- 10 10 NULL NULL NULL 2 NULL NULL
- explain extended select log(exp(10)),exp(log(sqrt(10))*2),log(-1),log(NULL),log(1,1),log(3,9),log(-1,2),log(NULL,2);
- id select_type table type possible_keys key key_len ref rows Extra
- 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
- Warnings:
- Note 1003 select log(exp(10)) AS `log(exp(10))`,exp((log(sqrt(10)) * 2)) AS `exp(log(sqrt(10))*2)`,log(-(1)) AS `log(-1)`,log(NULL) AS `log(NULL)`,log(1,1) AS `log(1,1)`,log(3,9) AS `log(3,9)`,log(-(1),2) AS `log(-1,2)`,log(NULL,2) AS `log(NULL,2)`
- select ln(exp(10)),exp(ln(sqrt(10))*2),ln(-1),ln(0),ln(NULL);
- ln(exp(10)) exp(ln(sqrt(10))*2) ln(-1) ln(0) ln(NULL)
- 10 10 NULL NULL NULL
- explain extended select ln(exp(10)),exp(ln(sqrt(10))*2),ln(-1),ln(0),ln(NULL);
- id select_type table type possible_keys key key_len ref rows Extra
- 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
- Warnings:
- Note 1003 select ln(exp(10)) AS `ln(exp(10))`,exp((ln(sqrt(10)) * 2)) AS `exp(ln(sqrt(10))*2)`,ln(-(1)) AS `ln(-1)`,ln(0) AS `ln(0)`,ln(NULL) AS `ln(NULL)`
- select log2(8),log2(15),log2(-2),log2(0),log2(NULL);
- log2(8) log2(15) log2(-2) log2(0) log2(NULL)
- 3 3.9068905956085 NULL NULL NULL
- explain extended select log2(8),log2(15),log2(-2),log2(0),log2(NULL);
- id select_type table type possible_keys key key_len ref rows Extra
- 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
- Warnings:
- Note 1003 select log2(8) AS `log2(8)`,log2(15) AS `log2(15)`,log2(-(2)) AS `log2(-2)`,log2(0) AS `log2(0)`,log2(NULL) AS `log2(NULL)`
- select log10(100),log10(18),log10(-4),log10(0),log10(NULL);
- log10(100) log10(18) log10(-4) log10(0) log10(NULL)
- 2 1.2552725051033 NULL NULL NULL
- explain extended select log10(100),log10(18),log10(-4),log10(0),log10(NULL);
- id select_type table type possible_keys key key_len ref rows Extra
- 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
- Warnings:
- Note 1003 select log10(100) AS `log10(100)`,log10(18) AS `log10(18)`,log10(-(4)) AS `log10(-4)`,log10(0) AS `log10(0)`,log10(NULL) AS `log10(NULL)`
- select pow(10,log10(10)),power(2,4);
- pow(10,log10(10)) power(2,4)
- 10 16
- explain extended select pow(10,log10(10)),power(2,4);
- id select_type table type possible_keys key key_len ref rows Extra
- 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
- Warnings:
- Note 1003 select pow(10,log10(10)) AS `pow(10,log10(10))`,pow(2,4) AS `power(2,4)`
- set @@rand_seed1=10000000,@@rand_seed2=1000000;
- select rand(999999),rand();
- rand(999999) rand()
- 0.014231365187309 0.028870999839968
- explain extended select rand(999999),rand();
- id select_type table type possible_keys key key_len ref rows Extra
- 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
- Warnings:
- Note 1003 select sql_no_cache rand(999999) AS `rand(999999)`,rand() AS `rand()`
- select pi(),format(sin(pi()/2),6),format(cos(pi()/2),6),format(abs(tan(pi())),6),format(cot(1),6),format(asin(1),6),format(acos(0),6),format(atan(1),6);
- pi() format(sin(pi()/2),6) format(cos(pi()/2),6) format(abs(tan(pi())),6) format(cot(1),6) format(asin(1),6) format(acos(0),6) format(atan(1),6)
- 3.141593 1.000000 0.000000 0.000000 0.642093 1.570796 1.570796 0.785398
- explain extended select pi(),format(sin(pi()/2),6),format(cos(pi()/2),6),format(abs(tan(pi())),6),format(cot(1),6),format(asin(1),6),format(acos(0),6),format(atan(1),6);
- id select_type table type possible_keys key key_len ref rows Extra
- 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
- Warnings:
- Note 1003 select pi() AS `pi()`,format(sin((pi() / 2)),6) AS `format(sin(pi()/2),6)`,format(cos((pi() / 2)),6) AS `format(cos(pi()/2),6)`,format(abs(tan(pi())),6) AS `format(abs(tan(pi())),6)`,format((1 / tan(1)),6) AS `format(cot(1),6)`,format(asin(1),6) AS `format(asin(1),6)`,format(acos(0),6) AS `format(acos(0),6)`,format(atan(1),6) AS `format(atan(1),6)`
- select degrees(pi()),radians(360);
- degrees(pi()) radians(360)
- 180 6.2831853071796
- SELECT ACOS(1.0);
- ACOS(1.0)
- 0
- SELECT ASIN(1.0);
- ASIN(1.0)
- 1.5707963267949
- SELECT ACOS(0.2*5.0);
- ACOS(0.2*5.0)
- 0
- SELECT ACOS(0.5*2.0);
- ACOS(0.5*2.0)
- 0
- SELECT ASIN(0.8+0.2);
- ASIN(0.8+0.2)
- 1.5707963267949
- SELECT ASIN(1.2-0.2);
- ASIN(1.2-0.2)
- 1.5707963267949
- explain extended select degrees(pi()),radians(360);
- id select_type table type possible_keys key key_len ref rows Extra
- 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
- Warnings:
- Note 1003 select degrees(pi()) AS `degrees(pi())`,radians(360) AS `radians(360)`
- select rand(rand);
- ERROR 42S22: Unknown column 'rand' in 'field list'
- create table t1 select round(1, 6);
- show create table t1;
- Table Create Table
- t1 CREATE TABLE `t1` (
- `round(1, 6)` double(7,6) NOT NULL default '0.000000'
- ) ENGINE=MyISAM DEFAULT CHARSET=latin1
- select * from t1;
- round(1, 6)
- 1.000000
- drop table t1;
- select abs(-2) * -2;
- abs(-2) * -2
- -4
- create table t1 (i int);
- insert into t1 values (1);
- select rand(i) from t1;
- ERROR HY000: Incorrect arguments to RAND
- drop table t1;
- create table t1 (a varchar(90), ts datetime not null, index (a)) engine=innodb default charset=utf8;
- insert into t1 values ('http://www.foo.com/', now());
- select a from t1 where a='http://www.foo.com/' order by abs(timediff(ts, 0));
- a
- http://www.foo.com/
- drop table t1;