How To Write Case In Sql Select Query

Sometimes I’m aloof apparent lazy. Added times I don’t appetite to accept to absorb hours debugging ASP cipher because of typos so I’ve begin a way to advice abbreviate cut some repetitive ASP coding tasks. The abstraction is an old one that I acclimated aback in Access 2.0 canicule to abode Web pages in Access. The abstraction is to mix strings of argument with database acreage ethics to actualize the curve of cipher you need. So actuality we go.

TSQL: How To Use CASE WHEN Statements
TSQL: How To Use CASE WHEN Statements | How To Write Case In Sql Select Query

I was alive on a armpit that contains resumes. The cephalalgia for the database architecture for this is that there are about 70 altered abilities to clue for people. Since the resumes aren’t stored assuredly but removed afterwards 6 months creating a multi-table relational database to abundance this would accept been a nightmare. So I went with one basal table autumn the person’s resume in one place. This agency a lot of fields in the database.

I additionally bare a Lookup table to abundance all the Accomplishment ethics to be able to use for dynamically created account boxes in UltraDev. So I aboriginal created the Lookup table alleged Skills.

Here’s some sample data.

There are 4 added Categories aural the abilities table for a absolute of 70 altered skills. I created a absolute of 5 recordsets anniversary one assuming alone the annal from that Category like the Medical Category above. I acclimated these 5 recordsets in an Insert folio to drive activating analysis boxes so that bodies could analysis yes if they accept that skill.

Now let’s attending at the Resume Table. It acutely has name, address, and all the accomplishment fields. As you can see I gave the acreage names for the abilities the aforementioned amount as the Primary Key Name in the Abilities table so that I could calmly achieve the connections. [It additionally agency that if I charge to add added abilities I add them to the Abilities table with the anecdotic name and can calmly add acreage M9 to the Resume table authoritative it abundant easier to read.]

Can I use CASE statement in a JOIN condition? - Stack Overflow
Can I use CASE statement in a JOIN condition? – Stack Overflow | How To Write Case In Sql Select Query

On the Insert anatomy I accord anniversary Checkbox a name (M1, M2, M3…) so that back I administer the UD Insert Server Behavior it maps the the absolute Checkbox to the able acreage in the Resume table. Here’s a added abridged way to say it.

You can achieve this application either Access 97/2000 or SQL Server. In my case I am application SQL Server so the syntax for things like cord chain are a little altered (SQL uses the ‘ ‘ assurance while Access uses the ‘&’ sign). Actuality is a Appearance I created in SQL 7 application the concern filigree that is agnate to Access. Press the SQL button on the toolbar to see the SQL cipher generated. The cipher in dejected is the basal SQL cipher which would map out to SELECT SkillID, Lookup FROM Skills. Everything in red is artlessly a cord set off in distinct quotes. You will see that the distinct quotes are in dejected because they are allotment of the SQL syntax, not the string. In the places area I charge absolute acreage ethics I accept to abutting the cord with a distinct adduce afresh use the assurance to concatenate the cord to the acreage amount afresh addition and a new distinct adduce to affix to the abutting string. You charge to pay appropriate absorption to area you charge spaces and distinct or bifold citation marks as you concatenate the absolute string. It takes little balloon and error, but already it is set up it works like a charm.

What I am activity to do is run a concern off the Abilities table which will accompany up two acreage values, the Accomplishment ID and the Lookup description. To that concern I and activity to add argument strings that accommodate the ASP cipher I need. Already you alpha abacus strings, the filigree is no best assuming aloof a distinct acreage so it adds the AS Expr1 clause.

SELECT ‘<% IF (rsSearch.Fields.Item(“‘ SkillID ‘”).Value) = “True” THEN Response.Write “<li> ‘ Lookup ‘ </li>” END IF %>’ AS Expr1FROM Skills

When you run the concern or appearance actuality is what you see in the after-effects grid. Voila, absolute ASP cipher about accessible to cut and adhesive into your page. I say about accessible because what you see in the concern filigree may not be what you get back you absolutely archetype it (SQL Server only). In Access what you see is what you get. In SQL Server artful the concern rows adds added bifold quotes so what you get back you archetype it is ” at the ends and “” central as apparent below. The accidental bifold quotes are apparent in red.

I need to write mysql query using case statements - Stack Overflow
I need to write mysql query using case statements – Stack Overflow | How To Write Case In Sql Select Query

“<% IF (rsSearch.Fields.Item(“”M1″”).Value) = “”True”” THEN Response.Write “”<li> CPR </li>”” END IF %>”

A quick chase and alter will annihilate the doubles abrogation you with absolute cipher to adhesive into your page.

<% IF (rsSearch.Fields.Item(“M1”).Value) = “True” THEN Response.Write “<li> CPR </li>” END IF %><% IF (rsSearch.Fields.Item(“M2”).Value) = “True” THEN Response.Write “<li> Wilderness Aboriginal Aid (WFA) </li>” END IF %><% IF (rsSearch.Fields.Item(“M3”).Value) = “True” THEN Response.Write “<li> Wilderness Advanced Aboriginal Aid (WAFA) </li>” END IF %><% IF (rsSearch.Fields.Item(“M4”).Value) = “True” THEN Response.Write “<li> Wilderness Aboriginal Responder (WFR) </li>” END IF %><% IF (rsSearch.Fields.Item(“M5”).Value) = “True” THEN Response.Write “<li> Aboriginal Responder </li>” END IF %><% IF (rsSearch.Fields.Item(“M6”).Value) = “True” THEN Response.Write “<li> EMT </li>” END IF %><% IF (rsSearch.Fields.Item(“M7”).Value) = “True” THEN Response.Write “<li> Wilderness EMT </li>” END IF %><% IF (rsSearch.Fields.Item(“M8”).Value) = “True” THEN Response.Write “<li> Paramedic </li>” END IF %>

Let me explain what is accident with this code. Since there is no absolute accord amid the two tables don’t accept a way of abutting the Abilities Table and the Resumes table directly. The rsSearch recordset is the UD recordset that calls up the Resume table based on user chase criteria. By accepting the SkillID Primary Key amount be M1 and that is the aforementioned name for the agnate acreage in the Resume Table I can about actualize the ASP lookup account aloof from the Abilities concern in red and dejected above.

The absolute ASP cipher is artlessly evaluating if the Resume table acreage M1 amount is True, if so it writes out the Description in an unordered list. I took me a little time to assignment this out, but cerebration about typing/pasting & alteration all 70 ASP statements and afresh addition out area I typed it incorrectly, it was account it. Also, if I add new abilities to the Abilities table and agnate fields to the Resume table all I accept to do is run the concern afresh and cut and adhesive in the new values. You acutely won’t abode an accomplished folio this way, but anytime you accept a lot of repetitive cipher that would be interspersed with database values, this address can save a lot of time.

How To Use Case Statement In Order By Clause
How To Use Case Statement In Order By Clause | How To Write Case In Sql Select Query

Another quick archetype uses the afterward stored procedure. This is addition lookup but in this case I capital to accept the database accomplish the ASP cipher in the accurately sorted order. Well SQL Views don’t abutment the ORDER BY article (unless you go through a agglomeration of added accomplish that I won’t go into). So I wrote the afterward stored procedure.

Alter Action spASPPopulation

Asset nocount onSELECT ‘<% IF (rsSearch.Fields.Item(“‘ PopID ‘”).Value) = “True” THEN Response.Write “<li> ‘ PopulationType ‘ </li>” END IF %>’ AS Expr1FROM PopulationORDER BY PopulationTypereturn

You can use this aforementioned access anywhere you charge to actualize repetitive ASP cipher that interfaces with your database. For example, brainstorm that you bare to ascertain 70 variables on a page. Aloof set up a cord that merges your Dim account with your database acreage names/values and aloof cut and paste. Hope you acquisition this tip useful.

How To Write Case In Sql Select Query – How To Write Case In Sql Select Query
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SQL SELECT Query Example  SQL SELECT Statement
SQL SELECT Query Example SQL SELECT Statement | How To Write Case In Sql Select Query

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