叙述関数
ABS(numeric_expr)
Returns the absolute (positive) value of the specified numeric expression.
- numeric_expr: A numeric expression.
ACOS(numeric_expr)
Returns the angle, in radians, whose cosine is the specified numeric expression; also called arccosine.
- numeric_expr: A numeric expression.
ASIN(numeric_expr)
Returns the angle, in radians, whose sine is the specified numeric expression. This is also called arcsine.
- numeric_expr: A numeric expression.
ATAN(numeric_expr)
Returns the angle, in radians, whose tangent is the specified numeric expression. This is also called arctangent.
- numeric_expr: A numeric expression.
CEILING(numeric_expr)
Returns the smallest integer value greater than, or equal to, the specified numeric expression.
- numeric_expr: A numeric expression.
COS(numeric_expr)
Returns the trigonometric cosine of the specified angle, in radians, in the specified expression.
- numeric_expr: A numeric expression.
COT(numeric_expr)
Returns the trigonometric cotangent of the specified angle, in radians, in the specified numeric expression.
- numeric_expr: A numeric expression.
DEGREES(numeric_expr)
Returns the corresponding angle in degrees for an angle specified in radians.
- numeric_expr: A numeric expression.
FLOOR(numeric_expr)
Returns the largest integer less than or equal to the specified numeric expression.
- numeric_expr: A numeric expression.
EXP(numeric_expr)
Returns the exponential value of the specified numeric expression.
- numeric_expr: A numeric expression.
LOG10(numeric_expr)
Returns the base-10 logarithm of the specified numeric expression.
- numeric_expr: A numeric expression.
RADIANS(numeric_expr)
Returns radians when a numeric expression, in degrees, is entered.
- numeric_expr: A numeric expression.
RAND()
Returns a randomly generated numeric value from [0,1).
ROUND(numeric_expr)
Returns a numeric value, rounded to the closest integer value.
- numeric_expr: A numeric expression.
SIGN(numeric_expr)
Returns the positive (+1), zero (0), or negative (-1) sign of the specified numeric expression.
- numeric_expr: A numeric expression.
SIN(numeric_expr)
Returns the trigonometric sine of the specified angle, in radians, in the specified expression.
- numeric_expr: A numeric expression.
SQRT(numeric_expr)
Returns the square root of the specified numeric value.
- numeric_expr: A numeric expression.
SQUARE(numeric_expr)
Returns the square of the specified numeric value.
- numeric_expr: A numeric expression.
TAN(numeric_expr)
Returns the tangent of the specified angle, in radians, in the specified expression.
- numeric_expr: A numeric expression.
TRUNC(numeric_expr)
Returns a numeric value, truncated to the closest integer value.
- numeric_expr: A numeric expression.
ATN2(y_expr, x_expr)
Returns the principal value of the arc tangent of y/x, expressed in radians.
- y_expr: The y numeric expression.
- x_expr: The x numeric expression.
LOG(numeric_expr [, base])
Returns the natural logarithm of the specified numeric expression.
- numeric_expr: A numeric expression.
- base: Optional numeric argument that sets the base for the logarithm.
PI()
Returns the constant value of PI.
POWER(numeric_expr, power_expr)
Returns the value of the specified expression to the specified power.
- numeric_expr: A numeric expression.
- power_expr: Is the power to which to raise numeric_expr.
IS_ARRAY(expr)
Returns a Boolean value indicating if the type of the specified expression is an array.
- expr: Any valid expression.
IS_BOOL(expr)
Returns a Boolean value indicating if the type of the specified expression is a Boolean.
- expr: Any valid expression.
IS_DEFINED(expr)
Returns a Boolean indicating if the property has been assigned a value.
- expr: Any valid expression.
IS_NULL(expr)
Returns a Boolean value indicating if the type of the specified expression is null.
- expr: Any valid expression.
IS_NUMBER(expr)
Returns a Boolean value indicating if the type of the specified expression is a number.
- expr: Any valid expression.
IS_OBJECT(expr)
Returns a Boolean value indicating if the type of the specified expression is a JSON object.
- expr: Any valid expression.
IS_PRIMITIVE(expr)
Returns a Boolean value indicating if the type of the specified expression is a primitive (string, Boolean, numeric, or null).
- expr: Any valid expression.
IS_STRING(expr)
Returns a Boolean value indicating if the type of the specified expression is a string.
- expr: Any valid expression.
CONCAT(str1, str2 [, str3] [, ...])
Returns a string that is the result of concatenating two or more string values.
- str1: The first string to concatenate.
- str2: The second string to concatenate.
- str3: The third string to concatenate.
CONTAINS(str1, str2)
Returns a Boolean indicating whether the first string expression contains the second.
- str1: The string to search in.
- str2: The string to search for.
ENDSWITH(str1, str2)
Returns a Boolean indicating whether the first string expression ends with the second.
- str1: The string to search in.
- str2: The string to search for.
INDEX_OF(str1, str2)
Returns the starting position of the first occurrence of the second string expression within the first specified string expression, or -1 if the string is not found.
- str1: The string to search in.
- str2: The string to search for.
LEFT(str, num_expr)
Returns the left part of a string with the specified number of characters.
- str: A valid string expression.
- num_expr: The number of characters to return.
LENGTH(str)
Returns the number of characters of the specified string expression.
- str: Any valid string expression.
LOWER(str)
Returns a string expression after converting uppercase character data to lowercase.
- str: Any valid string expression.
LTRIM(str)
Returns a string expression after it removes leading blanks.
- str: Any valid string expression.
REPLACE(original_value, from_value, to_value)
Replaces all occurrences of a specified string value with another string value.
- original_value: The string to search in.
- from_value: The string to search for.
- to_value: The string to replace instances of from_value.
REPLICATE(str, repeat_num)
Repeats a string value a specified number of times.
- str: The string expression to repeat.
- repeat_num: The number of times to repeat the str expression.
REVERSE(str)
Returns the reverse order of a string value.
- str: Any valid string expression.
RIGHT(str, num_expr)
Returns the right part of a string with the specified number of characters.
- str: Any valid string expression.
- num_expr: The starting index.
RTRIM(str)
Returns a string expression after it removes trailing blanks.
- str: Any valid string expression.
STARTSWITH(str1, str2)
Returns a Boolean indicating whether the first string expression starts with the second.
- str1: The string to search in.
- str2: The string to search for.
SUBSTRING(str, start_index, length)
Returns part of a string expression starting at the specified character zero-based position and continues to the specified length, or to the end of the string.
- str: Any valid string expression.
- start_index: The starting index.
- length: The length of the string to return.
TOSTRING(expr)
Returns a string representation of scalar expression.
- expr: Any valid expression.
TRIM(str)
Returns a string expression after it removes leading and trailing blanks.
- str: Any valid string expression.
UPPER(str)
Returns a string expression after converting lowercase character data to uppercase.
- str: Any valid string expression.
ARRAY_CONCAT(array_exp1, array_exp2 [, array_exp3])
Returns an array that is the result of concatenating two or more array values.
- array_exp1: Any valid array expression.
- array_exp2: Any valid array expression.
- array_exp3: Any valid array expression.
ARRAY_CONTAINS(array_exp, expr [, bool_expr])
Returns a Boolean indicating whether the array contains the specified value. You can check for a partial or full match of an object by using a boolean expression within the command.
- array_exp1: Any array expression.
- expr: The expression to search for.
- bool_expr: If it's set to 'true'and if the specified search value is an object, the command checks for a partial match (the search object is a subset of one of the objects). If it's set to 'false', the command checks for a full match of all objects within the array. The default value if not specified is false.
ARRAY_LENGTH(array_exp)
Returns the number of elements of the specified array expression.
- array_exp: Any valid array expression.
ARRAY_SLICE(array_exp, start_index, max_size)
Returns part of an array expression.
- array_exp: Any valid array expression.
- start_index: Zero-based numeric index at which to begin the array. Negative values may be used to specify the starting index relative to the last element of the array i.e. -1 references the last element in the array.
- max_size: Maximum number of elements in the resulting array.
ST_DISTANCE(spatial_expr1, spatial_expr2)
Returns the distance between the two GeoJSON Point, Polygon, or LineString expressions.
- spatial_expr1: Is any valid GeoJSON Point, Polygon, or LineString object expression.
- spatial_expr2: Is any valid GeoJSON Point, Polygon, or LineString object expression.
ST_WITHIN(spatial_expr1, spatial_expr2)
Returns a Boolean expression indicating whether the GeoJSON object (Point, Polygon, or LineString) specified in the first argument is within the GeoJSON (Point, Polygon, or LineString) in the second argument.
- spatial_expr1: Is any valid GeoJSON Point, Polygon, or LineString object expression.
- spatial_expr2: Is any valid GeoJSON Point, Polygon, or LineString object expression.
ST_INTERSECTS(1, 2)
Returns a Boolean expression indicating whether the GeoJSON object (Point, Polygon, or LineString) specified in the first argument intersects the GeoJSON (Point, Polygon, or LineString) in the second argument.
- spatial_expr1: Is any valid GeoJSON Point, Polygon, or LineString object expression.
- spatial_expr2: Is any valid GeoJSON Point, Polygon, or LineString object expression.
ST_ISVALID(spatial_expr)
Returns a Boolean value indicating whether the specified GeoJSON Point, Polygon, or LineString expression is valid.
- spatial_expr: Is any valid GeoJSON Point, Polygon, or LineString object expression.
ST_ISVALIDDETAILED(spatial_expr)
Returns a JSON value containing a Boolean value if the specified GeoJSON Point, Polygon, or LineString expression is valid, and if invalid, additionally the reason as a string value.
- spatial_expr: Is any valid GeoJSON Point, Polygon, or LineString object expression.