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日期:2024-08-07
Use IF THEN ELSE IF : IF « PL SQL Statements « Oracle PL/SQL Tutorial ... SQL> SQL> SET SERVEROUTPUT ON SQL> SET ECHO ON SQL> DECLARE 2 employee_name_c CHAR(32); 3 employee_name_v VARCHAR2(32); 4 BEGIN 5 --Assign ......
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日期:2024-08-07
How do you say the following in Microsoft SQL Server 2005: IF EXISTS (SELECT * FROM Table WHERE FieldValue='') THEN SELECT TableID FROM Table WHERE FieldValue='' ELSE INSERT INTO TABLE(Field......
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日期:2024-08-05
Hello, I am trying to select a between two fields. Looking around web sites and " CASE .. WHEN .. THEN .. ELSE .. END " seems popular. In SQL SECECT statement, I trying to ......
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日期:2024-08-11
PL/SQL IF THEN ELSE conditional control statements. PL/SQL Conditional Control two type: IF THEN ELSE statement and CASE statement. ... Nested IF THEN ELSE Statement Logically IF THEN ELSIF Statement and Nested IF THEN ELSE Statement both ......
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日期:2024-08-12
This question already has an answer here: How do you perform an IF ... You can make the following sql query. IF ((SELECT COUNT(*) FROM ......
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日期:2024-08-11
The CASE statement is the closest to IF in SQL and is supported on all versions of SQL Server ..... From this link: IF THEN ELSE in T-SQL ......
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日期:2024-08-09
SQL Server: CASE WHEN OR THEN ELSE END => the OR is not ... It more closely fits the OP's question, and if you want to nest some ......
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日期:2024-08-10
The IF statement is used to test for a condition. ... SQL Server 2008 R2 ... Then control jumps to the point after the statement, or block of statements, following the  ......