首先,确保你要处理的字段是数值类型(如INTEGER、NUMERIC、DECIMAL等),因为ROUND函数主要对数值类型字段进行操作。 使用ROUND函数对字段进行四舍五入: ROUND函数用于对数值进行四舍五入。其基本语法为: sql ROUND(number, decimal_places) 其中,number是你要处理的数值,decimal_places是你希望
Form): ... places = SimpleArrayField(SimpleArrayField(IntegerField()), delimiter='|') >>> form = GridForm({'places': '1,2|2,1|4,3'}) >>> form.is_valid() True >>> form.cleaned_data {'places': [[1, 2], [2, 1], [4, 3]]} 备注 该字段不支持定界符的转义,所以当定界符...
下面测试一下fixeddecimal+PostgreSQL 9.5的性能表现,对1亿数据进行加减乘除以及聚合的运算,看float8, numeric, fixeddecimal类型的运算结果和速度: 使用auto_explain记录下对比float8,numeric,fixeddecimal的执行计划和耗时。 psql \timingpostgres=# load'auto_explain'; LOAD Time: 2.328 mspostgres=#setauto_explain....
当把一个JSON类型的字符串转换成JSONB类型时,JSON字符串内的数据类型实际上被转换成了PostgreSQL数据库中的类型,两者的映射关系见下表。 需要注意的是,如果是在JSONB中,不能输入超出 PostgreSQL的numeric数据类型范围的值。 示例 存储JSON数据 -- 创建表CREATETABLEstudents(idSERIALPRIMARYKEY,info JSONB);-- 向表...
job_id|integer|not null salary|numeric(8,2)|default NULL::numeric Indexes:"employees_pkey"PRIMARY KEY, btree(employee_id)Foreign-key constraints:"employeesnew_job_id_fkey"FOREIGN KEY(job_id)REFERENCES jobs(job_id)ON UPDATE CASCADE ON DELETE RESTRICT Copy...
If an ASCII code is a numeric glyph, it can be turned into the actual numeric equivalent with code - 0x30. (You’ll sometimes hear the phrase “7-bit ASCII.” This is, strictly speaking, redundant. ASCII doesn’t define any code points above 127. Everything that uses the range 128-...
Aug 2 2010 Navicat for PostgreSQL (Windows) version 9.0.12 Bug Fixes: Foreign Key Data Selection did not work properly. Brackets in FROM clause could not be parsed between Query Editor and Query Builder. When exporting numeric data with comma as decimal seperator to access file, the numbers...
2. 3. 4. 5. 6. 7. GREATEST(n1,n2,n3,...) The GREATEST() function returns the greatest value in the set of input parameters (n1, n2, n3, and so on). The following example uses the GREATEST() function to return the largest number from a set of numeric values: 复制 testdb...
问postgresql四舍五入函数ENPostgreSQL中的round(numeric，integer)函数仅向上舍入：很多时候 我们需要对...
Numeric functions Oracle functionFunction definitionPostgreSQL functionFunction definitionEquivalent ABS Absolute value of n: abs (-11.3) → 11.3. ABS(n) Absolute value of n: abs (-11.3) → 11.3. Yes CEIL Returns the smallest integer that is greater than or equal t...