WHEN condition_n THEN statements_n [ ELSE else_statements ] END CASE;] Code language: PostgreSQL SQL dialect and PL/pgSQL (pgsql) The searched CASE statement follows the rules below: The conditions in the WHEN
...附录:参考资料 1.Oracle CASE WHEN 用法介绍 2.https://dba.stackexchange.com/questions/1170/oracle-sql-case-in-a-where-clause 28110 程序员在写 SQL 时常犯的10个错误 当你写SQL时要不停得想到NULL的用法: 这个NULL完整性约束条件是正确的? NULL是否影响到结果? 2、在Java内存中处理数据 很少有...
–简单Case函数 CASE sex WHEN ‘1’ THEN ‘男’ WHEN ‘2’ THEN ‘女’ ELSE ‘其他’ END ...
You can use aCASEexpression in any statement or clause that accepts a valid expression. For example, you can use theCASEexpression in statements such asSELECT,UPDATE, orDELETE, and in clauses likeSELECT,WHERE,HAVING, andORDER BY. TheCASEexpression has two forms: SimpleCASEexpression. SearchedCA...
"Simple" SQL to check for alpha or numeric charcters isn't working right "String or binary data would be truncated.\r\nThe statement has been terminated." "String or binary data would be truncated" and field specifications “Unable to enlist in the transaction” with Oracle linked server fro...
FromOracle Database 23ai, theautomatic SQL transpilercan extract SQL expressions in PL/SQL. These are then part of the SQL statement, so at runtime it's as-if the function doesn't exist! To do this, ensure thesql_transpilerparameter ison(it'soffby default). When a function in thewhere...
In this example, if the deptno column has a 10 in it, the SQL query will return the value accounting rather than the number 10. If the deptno is not 10, 20, 30, or 40, then the CASE statement will fall through to the ELSE clause, which will return unassigned. Note that with a ...
appears in the statement. In some simple cases, SQL Server andMySQLcan use this index even if the query remains unchanged. Sometimes, however, the query must be changed to refer to the name of the new columns in order to use the index. Always check the execution plan in case of doubt....
oraclesql中带查询的cast和case语句我不知道你为什么在里面使用整个查询CAST，但如果您使用SELECT以及()...
Each statement_list consists of one or more SQL statements; an empty statement_list is not permitted. To handle situations where no value is matched by any WHEN clause, use an ELSE containing an empty BEGIN ... END block, as shown in this example. (The indentation used here in the ELS...