sql - NOT IN vs NOT EXISTS - Stack Overflow
Which of these queries is the faster? NOT EXISTS: SELECT ProductID, ProductName FROM Northwind..Products p WHERE NOT EXISTS ( SELECT 1 FROM Northwind..[Order Details] …
How do I perform an IF...THEN in an SQL SELECT?
2008年9月15日 · 2059 The CASE statement is the closest to IF in SQL and is supported on all versions of SQL Server.
SQL: IF clause within WHERE clause - Stack Overflow
2008年9月18日 · Is it possible to use an IF clause within a WHERE clause in MS SQL? Example: WHERE IF IsNumeric(@OrderNumber) = 1 OrderNumber = @OrderNumber ELSE …
SQL WITH clause example - Stack Overflow
2012年9月23日 · 353 The SQL WITH clause was introduced by Oracle in the Oracle 9i release 2 database. The SQL WITH clause allows you to give a sub-query block a name (a process also …
sql - Incorrect syntax near '' - Stack Overflow
SELECT TOP 1000 * FROM master.sys.procedures as procs left join master.sys.parameters as params on procs.object_id = params.object_id This seems totally correct, but I keep getting …
sql - Find all tables containing column with specified name - Stack ...
@Revious INFORMATION_SCHEMA views included in SQL Server comply with the ISO standard definition for the INFORMATION_SCHEMA., sys.columns, sys.tables is Microsoft Sql Server …
sql - ORA-00904: invalid identifier - Stack Overflow
2011年5月17日 · SQL> Oracle SQL allows us to ignore the case of database object names provided we either create them with names all in upper case, or without using double quotes.
SQL - Select first 10 rows only? - Stack Overflow
2009年12月12日 · How do I select only the first 10 results of a query? I would like to display only the first 10 results from the following query: SELECT a.names, COUNT(b.post_title) AS num …
sql - How do I split a delimited string so I can access individual ...
2015年11月2日 · Using SQL Server, how do I split a string so I can access item x? Take a string "Hello John Smith". How can I split the string by space and access the item at index 1 which …
SQL SELECT WHERE field contains words - Stack Overflow
2013年1月12日 · SQL SELECT WHERE field contains words Asked 12 years, 10 months ago Modified 6 months ago Viewed 4.9m times