function(args) over([partition by expression][order byexpression asc/desc][rows/range…])注：[ ...
AI代码解释 ---Table structureforgrade---DROPTABLEIFEXISTS`grade`;CREATETABLE`grade`(`id`int(11)NOTNULLAUTO_INCREMENTCOMMENT'id',`sno`varchar(20)CHARACTERSETutf8COLLATEutf8_unicode_ciNULLDEFAULTNULLCOMMENT'学号',`courseName`varchar(20)CHARACTERSETutf8COLLATEutf8_unicode_ciNULLDEFAULTNULLCOMMENT'课程...
替换字符-将string中符合pattern的元素替换为function结果 : regexp_replace(string, pattern, function) → varchar eg:SELECT regexp_replace('new york', '(\w)(\w*)', x -> upper(x[1]) || lower(x[2])); --'New York' 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. ...
NOW() - 返回当前的系统日期和时间 FORMAT() - 格式化某个字段的显示方式 (3)GROUP BY 语句 GROUP BY 语句用于结合聚合函数,根据一个或多个列对结果集进行分组 SELECTcolumn_name,aggregate_function(column_name)FROMtable_nameWHEREcolumn_nameoperatorvalueGROUPBYcolumn_name; SELECT site_id, SUM(access_log.c...
select name,subject,score, rank() over(order by score) as row_number, percent_rank() over(partition by subject order by score) as percent_rank from t_fraction; Hive 行转列 lateral view explode create table testArray2( name string, weight array<string>)row format delimited fields terminated...
ランク1の行は、PERCENT_RANKが0(ゼロ)になります。構文は次のとおりです。 PERCENT_RANK () OVER ([query_partition_clause] order_by_clause) NTILE関数 NTILEを使用すると、三分位数、四分位数、十分位数およびその他の一般的な集計統計情報を簡単に計算できます。この関数では、順序付けられ...
下面定义了一个局部函数formatname: Java代码 1. declare 2. cursor c_allauthors is 3. select name,sex from auths; 4. 60); 5. function formatname(p_name in varchar2,p_sex in number) 6. return 7. 16); 8. begin 9. if p_sex=1 ...
SAPHANA学习(4):SQL Function(C) 32.CARDINALITY Function CARDINALITY(<array_value_expression>) 返回Array中包含数据个数 */ CREATECOLUMNTABLEARRAY_TEST (IDXINT, VALINTARRAY);INSERTINTOARRAY_TESTVALUES(1, ARRAY(1,2,3));INSERTINTOARRAY_TESTVALUES(2, ARRAY(10,20,30,40));SELECTCARDINALITY(VAL)...
SELECT TOP number|percent column_name(s) FROM table_name Mysql: SELECT column_name(s) FROM table_name LIMIT number Oracle: SELECT column_name(s) FROM table_name WHERE ROWNUM <= number SQL LIKE操作符 LIKE用于在WHERE子句中搜素列中的指定模式 语法: SELECT column_name(s) FROM table_name...
FORMAT GETDATE GETUTCDATE GET_TRANSMISSION_STATUS LAG LAST_VALUE LEAD MIN_ACTIVE_ROWVERSION NEWID NEWSEQUENTIALID NEXT VALUE FOR NTILE PARSENAME PERCENTILE_CONT PERCENTILE_DISC PERCENT_RANK RAND RANK ROW_NUMBER TEXTPTR 從函式呼叫擴充預存程序