A compound condition without parentheses : Logical operator « Query « SQL Server / T-SQL Tutorial

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SQL Server / T-SQL Tutorial » Query » Logical operator 
1.26.2.A compound condition without parentheses
4>
5>
6>
7create table Billings (
8>     BankerID           INTEGER,
9>     BillingNumber      INTEGER,
10>     BillingDate        datetime,
11>     BillingTotal       INTEGER,
12>     TermsID            INTEGER,
13>     BillingDueDate     datetime ,
14>     PaymentTotal       INTEGER,
15>     CreditTotal        INTEGER
16>
17);
18> GO
1>
2INSERT INTO Billings VALUES (11'2005-01-22', 1651,'2005-04-22',123,321);
3> GO

(rows affected)
1INSERT INTO Billings VALUES (22'2001-02-21', 1651,'2002-02-22',123,321);
2> GO

(rows affected)
1INSERT INTO Billings VALUES (33'2003-05-02', 1651,'2005-04-12',123,321);
2> GO

(rows affected)
1INSERT INTO Billings VALUES (44'1999-03-12', 1651,'2005-04-18',123,321);
2> GO

(rows affected)
1INSERT INTO Billings VALUES (55'2000-04-23', 1651,'2005-04-17',123,321);
2> GO

(rows affected)
1INSERT INTO Billings VALUES (66'2001-06-14', 1651,'2005-04-18',123,321);
2> GO

(rows affected)
1INSERT INTO Billings VALUES (77'2002-07-15', 1651,'2005-04-19',123,321);
2> GO

(rows affected)
1INSERT INTO Billings VALUES (88'2003-08-16', 1651,'2005-04-20',123,321);
2> GO

(rows affected)
1INSERT INTO Billings VALUES (99'2004-09-17', 1651,'2005-04-21',123,321);
2> GO

(rows affected)
1INSERT INTO Billings VALUES (00'2005-10-18', 1651,'2005-04-22',123,321);
2> GO

(rows affected)
1>
2>
3select from Billings WHERE BillingDate > '05/01/2002'
4>     OR BillingTotal > 500
5>     AND BillingTotal - PaymentTotal - CreditTotal > 0
6> GO
BankerID    BillingNumber BillingDate             BillingTotal TermsID     BillingDueDate          PaymentTotal CreditTotal
----------- ------------- ----------------------- ------------ ----------- ----------------------- ------------ -----------
          1             1 2005-01-22 00:00:00.000          165           1 2005-04-22 00:00:00.000          123         321
          3             3 2003-05-02 00:00:00.000          165           1 2005-04-12 00:00:00.000          123         321
          7             7 2002-07-15 00:00:00.000          165           1 2005-04-19 00:00:00.000          123         321
          8             8 2003-08-16 00:00:00.000          165           1 2005-04-20 00:00:00.000          123         321
          9             9 2004-09-17 00:00:00.000          165           1 2005-04-21 00:00:00.000          123         321
          0             0 2005-10-18 00:00:00.000          165           1 2005-04-22 00:00:00.000          123         321

(rows affected)
1>
2> drop table Billings;
3> GO
1>
1.26.Logical operator
1.26.1.The syntax of the WHERE clause with logical operators
1.26.2.A compound condition without parentheses
1.26.3.compound condition with parentheses
1.26.4.three Boolean operations have different priorities for evaluation:
1.26.5.SQL Server evaluates operators in this sequence: (1) NOT, (2) AND, and (3) OR.
1.26.6.Use OR to link two conditions
1.26.7.Use AND to link two conditions
1.26.8.AND, OR without parenthesis
1.26.9.parenthesis with AND, OR
1.26.10.And with parenthesis
1.26.11.Not or
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