Statement: each of the episode titles has letters somewhere within the title

Input Table: list of all that episodes

Step 1: Select the 'episode_title' column from the table.
season series episode_title original_air_date nick_prod
1 38 tia & tamera mowry / ll cool j 1996-11-16 338
2 39 montell jordan 1996-11-23 339
4 41 dru hill 1996-12-07 341
5 42 tyra banks / blackstreet 1996-12-14 342
6 43 music special 1996-12-17 343
7 44 a tribe called quest 1996-12-21 344
8 45 702 1996-12-28 345
9 46 tony! toni! tone! 1997-01-04 346
10 47 chris farley / mint condition 1997-01-11 347
11 48 112 1997-01-18 348
12 49 sherman hemsley / nas 1997-01-25 349
13 50 john leguizamo / mona lisa 1997-02-01 350
14 51 ray j 1997-02-08 351
15 52 for real 1997-09-20 352
16 53 aaliyah 1997-10-04 353
17 54 az yet 1997-09-27 354
18 55 monica 1997-10-11 355
19 56 mc lyte 1997-10-18 356
Step 2: Use a regular expression or string matching function to check if each episode title contains at least one letter.
episode_title
tia & tamera mowry / ll cool j
montell jordan
dru hill
tyra banks / blackstreet
music special
a tribe called quest
702
tony! toni! tone!
chris farley / mint condition
112
sherman hemsley / nas
john leguizamo / mona lisa
ray j
for real
aaliyah
az yet
monica
mc lyte
Step 3: Use a `CASE` statement to return TRUE if all episode titles satisfy the condition, otherwise return FALSE.
episode_title contains_letter
tia & tamera mowry / ll cool j FALSE
montell jordan FALSE
dru hill FALSE
tyra banks / blackstreet FALSE
music special FALSE
a tribe called quest FALSE
702 FALSE
tony! toni! tone! FALSE
chris farley / mint condition FALSE
112 FALSE
sherman hemsley / nas FALSE
john leguizamo / mona lisa FALSE
ray j FALSE
for real FALSE
aaliyah FALSE
az yet FALSE
monica FALSE
mc lyte FALSE