参考:https://stackoverflow.com/questions/42481826/how-to-use-multiple-where-clause-in-one-sql-query
参考:https://stackoverflow.com/questions/42481826/how-to-use-multiple-where-clause-in-one-sql-query
If you do not specify a WHERE clause, your query returns all rows from the table. If you specify more than one table in your query and you have not included a WHERE clause or a JOIN clause, your query generates a Cartesian product of the tables. WHERE is optional, but when included,...
IN返回数组:In IN operate allows you to specify multiple values in a WHERE clause(在IN的操作数中允许在WHERE子句中指定多个值) 9.Show the year, subject, and name of Physics winners for 1980 together with the Chemistry winners for 1984. SELECT yr,subject,winner FROM nobel WHERE (yr='1980' a...
解决方法:使用Query洞察排查当前Query是否在同一时间执行了TRUNCATE或DROP操作,详情请参见Query洞察。 ERRCODE_FEATURE_NOT_SUPPORTED或者Unsupported Feature 报错:Feature not supported: insert into parent table 问题原因:不支持直接写入数据至分区父表。 解决方法:SQL方式执行INSERT时,需要将数据写入指定的分区子表。详情...
While it’s definitely helpful to know some of the nitty-gritty of how to manually tune SQL queries, part of the appeal of SQL query optimization tools is their ability to streamline the tuning process and can even offer advice on clauses and statements where efficiency can be improved. Here...
duplicate table names with multiple schema names Duration of a sql job execution Dynamic order by Dynamic Pivot Conflicts with existing name error Dynamic pivot table with date range Dynamic Pivot with a where clause Dynamic Query and print @sql test dynamic query in view Dynamic query: EXEC - ...
operators in the statement. IfUNIONis involved in the main query, only the last query involving aUNIONoperation can have theOPTIONclause. Query hints are specified as part of theOPTION clause. Error 8622 occurs if one or more query hints cause the Query Optimizer not to generate a valid ...
Lateral View通常和UDTF一起出现,为了解决UDTF不允许在select字段的问题。Multiple Lateral View可以实现类似笛卡尔乘积。Outer关键字可以把不输出的UDTF的空结果,输出成NULL,防止丢失数据。 行转列 相关参数说明: CONCAT(string A/col, string B/col…):返回输入字符串连接后的结果,支持任意个输入字符串; ...
SQL_CCS_COLLATE_CLAUSESQL_CCS_LIMITED_COLLATIONSQL-92 完全一致性驱动程序将始终按支持返回所有这些选项。 返回值为“0”表示 不支持 CREATE CHARACTER SET 语句。 SQL_CREATE_COLLATION 3.0 一个SQLUINTEGER 位掩码,用于枚举 CREATE COLLATION 语句中的子句,如数据源支持的 SQL-92 中定义。以下位掩码用于确定支持...