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所以如果list是常量,则可以直接用IN, 否则要用find_in_set()函数。 也就是这两个sql是查询的效果是相同的: 1 2 SELECT * from C_PURCHASINGMASTERDATA where FIND_IN_SET(EKGRP,'C54,C02,C14,C60,C06,C61,C53,C51,C12,C08,C03,C07') SELECT * from C_PURCHASINGMASTERDATA where EKGRP in ('C54',...
typeSpec 类型:Microsoft.SqlServer.Management.SqlParser.Metadata. . :: . .DataTypeSpec TheDataTypeSpecobject that represents the built-in type specification. precision 类型:System. . :: . .Int32 The precision of the data type. scale 类型:System. . :: . .Int32 ...
SQL codeselect count(*) as cnt,week(editdate) as weekflg from projects where year(editdate) =2007 group by weekflg 每月 SQL codeselect count(*) as cnt,month(editdate) as monthflg from projects where year (editdate)=2007 group by monthflg 每天 SQL codeselect count(*) as cnt from pr...
mysql find_in_set 索引优化,写在前面:索引对查询的速度有着至关重要的影响,理解索引也是进行数据库性能调优的起点。考虑如下情况,假设数据库中一个表有10^6条记录,DBMS的页面大小为4K,并存储100条记录。如果没有索引,查询将对整个表进行扫描,最坏的情况下,如果所
[TEST1] [nvarchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS , [TEST2] [int] , [TEST3] [varchar(MAX)] ) ON [PRIMARY] I am getting an error saying Cannot find data type varchar(MAX). Kindly help in resolution of the error.. ...
10、JSON_TYPE()获取JSON类型 11、JSON_VALID()校验JSON格式 六、JSON类型的修改 1、全量修改 2、JSON_ARRAY_APPEND()向数组追加元素 3、JSON_ARRAY_INSERT()向数组指定位置插入元素 4、JSON_INSERT()插入新值 5、JSON_MERGE()合并json 6、JSON_MERGE_PATCH()合并json 7、JSON_MERGE_PRESERVE()合并json 8、...
80m,schema=<null>,driver=com.mysql.cj.jdbc.Driver,username=root,jndi=jdbc/JiraDS,type=<null>,transactionSupport=<null>,properties=<null>,cargoString=<null>,libArtifacts=[mysql:mysql-connector-java:6.0.4:null],defaultDatabase=<null>,systemUsername=<null>,dumpFilePath=<null>,importMethod=sql]...
[tank@localhost workspace]$ find ./database/ -name '*.sql' -print #查找以sql结尾的文件./database/28toplearning.sql[tank@localhost workspace]$ find ./database/ -name '*.sql*' -print #查找文件名包括sql文件./database/28toplearning.sql[tank@localhost workspace]$ find ./data...
T-SQL: How to find incorrect datetime data from "Char" format column In this article Introduction Solution Introduction One of my colleagues was asked me about problem finding incorrect data but their problem is this column is Char type and find incorrect rows by d...