TheCASE expressionis used to build IF … THEN … ELSE statements into your Microsoft SQL Server T-SQL code. CASE is used within a SQL statement, such as SELECT or UPDATE. Don’t mistake CASE for theIF ELSEcontrol of flow construct, which is used to evaluate the conditional execution of ...
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SQL_CU_DML_STATEMENTS = 所有数据操作语言语句都支持目录:SELECT、INSERT、UPDATE、DELETE;如果受支持,则SELECT FOR UPDATE 和定位更新和删除语句。SQL_CU_PROCEDURE_INVOCATION = ODBC 过程调用语句支持目录。SQL_CU_TABLE_DEFINITION = 所有表定义语句都支持目录:CREATE TABLE、CREATE VIEW、ALTER TABLE、DROP TABLE ...
E.g.: The requirement is to find out the count of employees for various conditions as given below. There are multiple ways of getting this output. Five different statements can be written to find the count of employees based on salary and commission conditions, or a single select having colu...
See the DELETE, INSERT, and UPDATE entries in the appendixAppendix F, "Embedded SQL Statements and Precompiler Directives". Using Subqueries Asubqueryis a nested SELECT statement. Subqueries let you conduct multi-part searches. They can be used to ...
EXECUTE IMMEDIATE must be used for SET statements specific to the Microsoft SQL Server (that is, those that are intended to execute at that server).Example:EXEC SQL DELETE FROM staff WHERE staff_id = 99 END-EXEC * Put the required SQL statement in prep. MOVE "insert into staff (staff_...
In order to execute these ALTER TABLE statements successfully, the storage table deptemps must be empty. Also, because the nested table is defined as a table of scalars (REFs), Oracle implicitly provides the column name COLUMN_VALUE for the storage table. ...
What are the case sensitivity differences between PostgreSQL and SQL Server? Compare index types in PostgreSQL vs. MSSQL 中文:大小写敏感问题比较 PostgreSQL区分大小写来进行字符串比较。LOWER()函数允许用户将字符串转换为全小写以进行比较(还有类似的UPPER()函数)。默认情况下,PostgreSQL将表名和列名转换为小写...
An INSERT statement can implicitly or explicitly refer to user-defined functions or stored procedures. This is known asnestingof SQL statements. A user-defined function or stored procedure that is nested within the INSERT must not access the table into which you are inserting values. ...
CASEcan be used in any statement or clause that allows a valid expression. For example, you can useCASEin statements such as SELECT, UPDATE, DELETE and SET, and in clauses such as, IN, WHERE, ORDER BY, and HAVING. Transact-SQL syntax...