SELECT获奖记录,MAX(获奖时间)FROM获奖记录表WHERE获得奖项='金奖'GROUP BY获奖记录"值比较条件WHERE子句支持等于、大于、小于、不等于运算符学位为学士,审查通过人数大于20...
select*from log where key like'abcd%'查询key不是以abcd开头的所有日志*|select*from log where key not like'abcd%'通过SQL的正则式函数进行模糊查询通过正则式函数，可以...
是UPDATE UPDATE tb 1_name SET col_name 1=expr 1[,col_name 2=expr 2.][WHERE where_definition]是DELETE DELETE FROM tb 1_name[WHERE where_definition]是SELECT SELECT[ALL|DISTINCT|DISTINCTROW]...
Update of Non-selective column UPDATE aa SET b='cc'WHERE a=1;Update of only selective column UPDATE aa SET a=3 WHERE a=1;Update of both columns UPDATE aa SET a=4,b='dd'WHERE a=2;DELETE...
通过SQL查询语句将_1和_2转换为int的示例：Select*from OSSOBject where cast(_1 as int)cast(_2 as int)同时，对于SelectObject支持在Where条件中进行隐式转换，例如下面语句中的...
IN SUBQUERY当需要匹配一组由子查询返回的值时，可以在WHERE子句中使用IN子查询，适用于从主查询中选择匹配子查询条件的行。NOT IN SUBQUERY用于从一个集合中排除...
在这些场景里，柔性事务能够很好的保证事务原子性，并且提供...回滚库存数据：UPDATE inventory SET stock=stock+1 WHERE id=123回滚优惠券使用：UPDATE coupon SET used=0 WHERE id=789
Update of Non-selective column UPDATE aa SET b='cc'WHERE a=1;Update of only selective column UPDATE aa SET a=3 WHERE a=1;Update of both columns UPDATE aa SET a=4,b='dd'WHERE a=2;DELETE...
ARRAY查询SELECT id,vj FROM json_test WHERE json_extract(vj,'$.addr[0].city')='beijing'and json_extract(vj,'$.addr[1].no')=0;说明查询ARRAY数据时，支持使用指定数据下标取值，...
explain select.from xxxxx_base 2_brd_ind_cw where ds=concat(SPLIT_PART(bi_week_dim('${bdp.system.bizdate}'),',',1),SPLIT_PART(bi_week_dim('${bdp.system.bizdate}'),',',2))说明UDF已...
具体可以参考如下代码示例：SELECT/*+MAPJOIN(t 2)*/eleme_uid,.FROM(SELECT eleme_uid,.FROM viewtable WHERE eleme_uid=skewed_value)t 1 LEFT JOIN(SELECT eleme_uid,.FROM customertable WHERE...
描述DELETE从指定表中删除满足WHERE子句的行。如果WHERE子句没有出现，效果将会是删除表中的所有行。结果是一个合法的空表。说明TRUNCATE支持快速移除表中所有行。...
语法SELECT[hint_clause](select_clause|'*')FROM table_name[force index(index_name)][WHERE where_clause][ORDER BY ordering_clause][LIMIT integer]|[LIMIT integer,integer]select_clause:=...
原始SQL：select`name`,`grade`from`student`where id=(select uid from优化前：select`name`,`grade`from`student`where id=(select uid from优化后：SELECT`name`,`grade...
当物化视图SQL的WHERE子句包含查询SQL的WHERE子句时：支持查询SQL的WHERE子句为等值，而物化视图SQL的WHERE子句为范围，但是查询SQL中所有WHERE子句涉及的列都必须...
WHERE子句中使用正则表达式指定tag value"class="reference-link">在WHERE子句中使用正则表达式指定tag value SELECT MEAN(water_level)FROM"h 2 o_feet"WHERE"location"=~/[m]/AND...
增加no_index_columns Hint，使不等于条件通过内部扫描执行，SQL示例如下：/*+no_index_columns=[tab 1.c 2]*/select c 1,c 2 from tab 1 where c 1=3 and c 2 100;like条件通过内部扫描...
格式：'$val{占位符名}'SQL代码示例如下：SELECT*FROM tablename WHERE area in('$val{area_ph}')-文本类型多选AND name='$val{name_ph}'-文本类型单选AND number=$val{number_...
SQL 20 select s_name,s_address from supplier,nation where s_suppkey in(select ps_suppkey from partsupp where ps_partkey in(select p_partkey from part where p_name like'drab%')and ps_...
语法select_statement:=SELECT[JSON|HOTDATA](select_clause|'*')FROM table_name[WHERE where_clause][GROUP BY group_by_clause][ORDER BY ordering_clause][PER PARTITION LIMIT(integer|bind_marker)...
ORDER BY p 2/该SQL支持ORDER BY，p 2列已设置为单等值前缀列SELECT*FROM test ORDER BY p 1/该SQL支持ORDER BY，但是不建议这么用SELECT*FROM test WHERE p 1=?ORDER BY p 3/该SQL...
语法单逻辑表UPDATE[LOW_PRIORITY][IGNORE][schema_name.]tbl_name SET assignment_list[WHERE where_condition]value:{expr|DEFAULT}assignment:col_name=value assignment_list:assignment[,...
DELETE table_name 1 FROM table_name 1[INNER JOIN|LEFT JOIN|RIGHT JOIN]table_name 2 ON table_name 1.column 1=table_name 2.column 1[WHERE where_condition]示例删除customer表中name为张三...
示例如下：UPDATE/*+ROLLBACK_ON_FAIL*/T SET c=c-1 WHERE id=1 ERROR 7531(HY 000):Inventory transactinal hints didn't allowed in autocommit mode语法PolarDB提供的Inventory Hint支持...
the Outer Court,the Middle Court,and the Inner Court.The Outer Court is where the emperor would receive foreign ambassadors and hold important ceremonies.The Middle Court is where the...
2.LEFT JOIN/LEFT ANTI JOIN左表的过滤条件要放到{subquery_where_condition}或者{where_condition}，右表的过滤条件要放到{subquery_where_condition}或者{on_condition}中...
操作符操作符示例select*from test where id 1=select*from test where id=1=select*from test where id=1=select*from test where id=1 select*from test where id 1 between and select*from test...
返回结果如下：ERROR:aggregate functions are not allowed in WHERE以上查询无效，因为聚合函数MAX不能在WHERE子句中使用。存在此限制的原因是，WHERE子句确定将进入聚合状态...
如果Join的where条件中的第一级谓词是OR，并且cond 1 OR cond 2的条件有左表也有右表，业务上应该考虑rewrite成join where cond 1 union all join where cond 2的形式，...
Q 20 select s_name,s_address from supplier,nation where s_suppkey in(select ps_suppkey from partsupp where ps_partkey in(select p_partkey from part where p_name like'magenta%')and ps_...
语法delete_statement:=DELETE FROM table_name WHERE where_clause说明Where_Clause必须可以唯一限定一行数据。语法限制DELETE的WHERE子句中，必须给出能够唯一定位一行数据的...
WHERE条件中不建议索引字段包含数学运算或函数运算：WHERE_FORBID_INDEX_COLUMN_HAS_MATH WHERE条件中不建议使用前通配符查找：WHERE_FORBID_BEFORE_WILDCARD_SEARCH WHERE条件中...
如源库中同一张表内存在两个列A和a，由于过滤条件忽略列名的英文大小写，则SQL WHERE语句仅支持过滤列A，不支持过滤列a，例如支持WHERE A=10，不支持WHERE a=10。...
DELETE语法用来删除表中的行数据，可指定过滤条件。语法DELETE FROM table_name WHERE where_clause;示例DELETE FROM dt WHERE p 1=10 AND p 2=20;DELETE FROM dt WHERE p 1 10;
Q 20 select s_name,s_address from supplier,nation where s_suppkey in(select ps_suppkey from partsupp where ps_partkey in(select p_partkey from part where p_name like'magenta%')and ps_...
查询和分析语句*|SELECT consumer_group FROM"internal-diagnostic_log"WHERE EXISTS(SELECT Latency FROM internal-operation_log WHERE"internal-diagnostic_log".LogStore="internal-operation_log...
语法格式select:SELECT[ALL|DISTINCT]{*|projectItem[,projectItem]*}FROM tableExpression[WHERE booleanExpression][GROUP BY{groupItem[,groupItem]*}][HAVING booleanExpression]内置UDAF函数...
[with cte[,.]]select[all|distinct]select_expr[,except_expr)][,replace_expr].from ld_data_unit.logical_table_name[where where_condition][group by{col_list|rollup(col_list)}][having having_...
则对应的SQL为如下：SELECT*FROM company_sales_record WHERE area='华北'AND order_number 0占位符用法示例：SELECT*FROM tablename WHERE area in('$val{area_ph}')-文本类型多选AND...
SELECT s_name,s_address FROM supplier,nation WHERE s_suppkey IN(SELECT ps_suppkey FROM partsupp WHERE ps_partkey IN(SELECT p_partkey FROM part WHERE p_name LIKE'forest%')AND ps_availqty...