仔细想一下, 60是int,优秀是string,确实类型不符。 sql修改如下: 1 2 3 4 5 select case whenscore < 60then''|| 60 else'优秀'end fromstuent 这样就都是string了,就不报错了。 把结果扩展一下 其实这个报错不只case when会报,其他语句也会报这个错。原因都是类型不符,只要抓住这个,去排错就行了。
仔细想一下, 60是int,优秀是string,确实类型不符。 sql修改如下: select case when score < 60 then '' || 60 else '优秀' end from stuent 1. 2. 3. 4. 5. 这样就都是string了,就不报错了。 把结果扩展一下 其实这个报错不只case when会报,其他语句也会报这个错。原因都是类型不符,只要抓住这个...
The following table lists and describes conventions that are used in the syntax diagrams in the Transact-SQL reference. Expand table ConventionUsed for UPPERCASE or UPPERCASE Transact-SQL keywords. italic User-supplied parameters of Transact-SQL syntax. bold Type database names, table names, colum...
SQL keywords are NOT case sensitive: select is the same as SELECT In this tutorial we will write all SQL keywords in upper-case.Semicolon after SQL Statements?Some database systems require a semicolon at the end of each SQL statement....
However, in the case of an NDB table with no explicit primary key, an AUTO_INCREMENT column is automatically defined and used as a “hidden” primary key. For this reason, you cannot create an NDB table having an AUTO_INCREMENT column and no explicit primary key. The following CREATE ...
pgsqlcasewhen报错：ERROR：invalidinputsyntaxforty。。。⽂章⽬录 问题 最近有个需求，sql如下：select case when score < 60 then 60 else '优秀' end from stuent 但是运⾏的时候报错了：ERROR: invalid input syntax for type numeric：'优秀'百度说：数据类型不符。仔细想⼀下， 60是int，...
Hello mingshi wu, Thank you for the report and test case. Quoting from manual "allowMultiQueries - Allow the use of ";" to delimit multiple queries during one statement. This option does not affect the 'addBatch()' and 'executeBatch()' methods, which rely on 'rewriteBatchStatements' inste...
A keyword; although capitalized in the BNF diagram, keywords are not case-sensitive. White space A whitespace character can be a space, a horizontal tab, or a line feed.BNF Grammar of the Java Persistence Query LanguageHere is the entire BNF diagram for the query language:QL...
Applies to: SQL Server Azure SQL Database Azure SQL Managed InstanceThe FOR XML mode can be RAW, AUTO, EXPLICIT, or PATH. It determines the shape of the resulting XML.Viktigt The XMLDATA directive to the FOR XML option is deprecated. Use XSD generation in the case of RAW and AUTO ...
SQL Server Yukon Beta 1 introduces the new TRY/CATCH construct for error handling in T-SQL. This construct allows you to trap transaction abort errors, even those that would have caused a batch to terminate in previous versions of SQL Server (conversion errors, deadlocks, and so on). The ...