Decode Fucntion Question

Question

Hi,
I am trying to run this select query below and the IF-THEN-ELSE statement is not working... I am basically trying to update the CUSTOMER.CUST_OPT_IN_RENTAL_IND column with 'N' flag to 'Y' WHERE cust_classif_tr3_FULL_NM ='VIP Program'
and CUST_OPT_IN_RENTAL_IND ='N'
and CUST_EMAIL_ADDR_IND = 'Y'
AND CUST_STAT_TR2_FULL_NM='Active' to be included in the query below. can anyone help please?
SELECT
CUSTOMER.CUSTOMER_SSKEY CUSTOMER_sskey,
TO_CHAR(( CUSTOMER.DATE_MODIFIED ),'MM/DD/YYYY') date_modified,
NVL(( CUSTOMER.SRC_CUST_ID ),( 'UNKNOWN' )) SRC_CUST_ID,
NVL(( CUSTOMER.EXTNL_CUST_ID ),( 'UNKNOWN' )) EXTNL_CUST_ID,
NVL(( TO_CHAR(( CUSTOMER.LAST_UPDATE_DT ),'MM/DD/YYYY') ),( '01/01/1900' )) LAST_UPDATE_DT,
NVL(( CUSTOMER.SUB_CONTNT_CD ),( 'UNKNO' )) SUB_CONTNT_CD,
NVL(( CUSTOMER.SUB_CONTNT_NM ),( 'UNKNOWN' )) SUB_CONTNT_NM,
DECODE((CUST_EMAIL_ADDR_IND ),( 'N' ),( '-')
, ( 'Y' ), ( 'EPITEST'|| LPAD(MOD(ROWNUM,100),3,'0')||'@INTERVALINTL.COM')
) email_address,
IF CUSTOMER.CUST_OPT_IN_RENTAL_IND :='N' THEN result :='Y';
ELSIF CUSTOMER.CUST_OPT_IN_RENTAL_IND :='N' THEN result := 'VIP Program' cust_classif_tr3_FULL_NM;
ELSIF CUSTOMER.CUST_OPT_IN_RENTAL_IND :='N' THEN result := 'Y' CUST_EMAIL_ADDR_IND;
ELSIF CUSTOMER.CUST_OPT_IN_RENTAL_IND :='N' THEN result := 'Active' CUST_STAT_TR2_FULL_NM;
ELSIF
END IF;
NVL(( CUSTOMER.EMAIL_FORMAT_PREF ),( 'UNKNOWN' )) email_format_pref,
NVL(( TRUNC( CUSTOMER.EMAIL_UNDELIVERABLE_COUNT ) ),( -1 )) email_undeliverable_count,
NVL(( CUSTOMER.EMAIL_HTML_CAPABILITY ),( 'UNKNOWN' )) email_html_capability,
NVL(( CUSTOMER.EMAIL_UNSUBSCRIBE ),( 'UNKNOWN' )) email_unsubscribe,
NVL(( CUSTOMER.CUST_ID ),( 0 )) CUST_ID,
NVL(( CUSTOMER.ONLINE_PROFILE_FIRST_NAME ),( 'UNKNOWN' )) ONLINE_PROFILE_FIRST_NAME,
NVL(( CUSTOMER.ONLINE_PROFILE_LAST_NAME ),( 'UNKNOWN' )) ONLINE_PROFILE_LAST_NAME,
NVL(( CUSTOMER.GOLD_BILL_TYPE_TR1_CD ),( 'UNKNO' )) GOLD_BILL_TYPE_TR1_CD,
NVL(( CUSTOMER.GOLD_BILL_TYPE_TR1_FULL_NM ),( 'UNKNOWN' )) GOLD_BILL_TYPE_TR1_FULL_NM,
NVL(( CUSTOMER.GOLD_BILL_TYPE_TR2_CD ),( 'UNKNO' )) GOLD_BILL_TYPE_TR2_CD
FROM
     CUSTOMERSTAGE CUSTOMER
Thanks,
Soph

Answer 1

Hi, Soph,
Welcome to the forum!
Whenever you hav a question, post a little sample data (CREATE TABLE and INSERT statments) and the resutls you want from that data.
In the case of a DML problem (such as UPDATE), the sample data should show what the tabels are like before the change, and the reuslts will be the contents of the changed table after it.
Always say what version of Oracle you're using.
Without that, people will still try to help you as much as they can, but that won't be much.
IF-THEN-ELSE is PL/SQL. You can't use PL/SQL statements in the middle of a SQL staement, such as SELECT, even if the SQL statement is being doen within PL/SQL.
Instead of IF-THEN-ELSE, you can use CASE in SQL, or, in some special situations, DECODE.
Here's an example of using CASE:
Say you have a column in your table called cust_opt_in_rental, and it could have the values 'N'. 'N1', 'N2' or 'N3'.
You want to produce a column in your result set called result, which will be derived from cust_opt_in_rental.
If cust_opt_in_rental is 'N', then result should be ''Y'
If cust_opt_in_rental is 'N1', then result should be 'VIP Program' followed by the column cust_classif_tr3_FULL_NM
If cust_opt_in_rental is 'N2', then result should be 'Y' followed by the column CUST_EMAIL_ADDR_IND
If cust_opt_in_rental is 'N3', then result should be 'Active' fololowed by the column CUST_STAT_TR2_FULL_NM
You can do that using CASE like this:
SELECT  CASE     customer.cust_opt_in_rental_ind
          WHEN  'N'   THEN  'Y';
          WHEN  'N1'  THEN  'VIP Program '  || cust_classif_tr3_full_nm
          WHEN  'N2'  THEN  'Y '         || cust_email_addr_ind
          WHEN  'N3'  THEN  'Active '       || cust_stat_tr2_full_nm
     END             AS result
FROM     ...This is one situation where DECODE would work as well.